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  1. Table of Contents
  2. Top
  3. Main Differences
  4. Design
    1. Dimensions
    2. Build Quality
    3. Jar Capacity
    4. Jar/Beaker Materials
    5. Blades
    6. Lid
    7. Power Cord
    8. In The Box
  5. Performance
    1. Fibrous Ingredients (Small Batches)
    2. Fibrous Ingredients (Full Capacity)
    3. Crushed Ice
    4. Nut Butter
    5. Noise
    6. Blade Speed
  6. Ease Of Use
    1. Controls And Programs
    2. Cleaning
  7. Comments

Ninja Blender Duo with Auto-iQ BL642 vs KitchenAid Diamond

Side-by-Side Comparison

Products

Ninja Blender Duo with Auto-iQ BL642
KitchenAid Diamond

Tested using Methodology v1.0

Updated Sep 24, 2024 05:16 PM

SEE PRICE
Amazon.com

Tested using Methodology v1.0

Updated May 29, 2023 03:08 PM

SEE PRICE
Amazon.com
Ninja Blender Duo with Auto-iQ BL642 Picture
KitchenAid Diamond Picture

Variants

  • BL642 (Black)
  • BL640 (Black)
  • BL641 (Black/Silver)
  • Diamond (Blue Steel)
  • Diamond (Boysenberry)
  • Diamond (Cobalt Blue)
  • Diamond (Contour Silver)
  • Diamond (Cranberry)
  • Diamond (Crystal Blue)
  • Diamond (Empire Red)
  • Diamond (Espresso)
  • Diamond (Green Apple)
  • Diamond (Grenadine)
  • Diamond (Hot Sauce)
  • Diamond (Majestic Yellow)
  • Diamond (Matte Black)
  • Diamond (Matte Gray)
  • Diamond (Metallic Chrome)
  • Diamond (Onyx Black)
  • Diamond (Pistachio)
  • Diamond (Raspberry Ice)
  • Diamond (Sky Blue)
  • Diamond (Tangerine)
  • Diamond (Watermelon)
  • Diamond (White)

Our Verdict

Ninja Blender Duo with Auto-iQ BL642

KitchenAid Diamond

The KitchenAid Diamond is better than the Ninja Blender Duo with Auto-iQ BL642. The KitchenAid makes a smoother blend with fibrous ingredients, whether working with small or big batches. It's also easier to use for thick blends like nut butter, and its blade design makes it easier to clean by hand. On the other hand, the Ninja comes with at least two personal jars for single-serve smoothies in addition to its 72-ounce pitcher. It also feels better built.

0 

Check Price

Blue Steel
Diamond
SEE PRICE
Amazon.com
Boysenberry
Diamond
SEE PRICE
Amazon.com
Black/Silver
BL641
SEE PRICE
Amazon.com
Cobalt Blue
Diamond
SEE PRICE
Amazon.com
 
Contour Silver
Diamond
SEE PRICE
Amazon.com
 
Cranberry
Diamond
SEE PRICE
Amazon.com
 
Crystal Blue
Diamond
SEE PRICE
Amazon.com
 
Empire Red
Diamond
SEE PRICE
Amazon.com
 
Espresso
Diamond
SEE PRICE
Amazon.com
 
Green Apple
Diamond
SEE PRICE
Amazon.com
 
Grenadine
Diamond
SEE PRICE
Amazon.com
 
Hot Sauce
Diamond
SEE PRICE
Amazon.com
 
Majestic Yellow
Diamond
SEE PRICE
Amazon.com
 
Matte Black
Diamond
SEE PRICE
Amazon.com
 
Matte Gray
Diamond
SEE PRICE
Amazon.com
 
Metallic Chrome
Diamond
SEE PRICE
Amazon.com
 
Onyx Black
Diamond
SEE PRICE
Amazon.com
 
Pistachio
Diamond
Amazon.com
 
Raspberry Ice
Diamond
SEE PRICE
Amazon.com
 
Sky Blue
Diamond
Amazon.com
 
Tangerine
Diamond
SEE PRICE
Amazon.com
 
Watermelon
Diamond
SEE PRICE
Amazon.com
 
White
Diamond
Amazon.com

Main Differences for
Multi-Purpose

Threshold 

0.10

Multi-Purpose 

6.9
8.9

Hot Blending 
 

No
Yes

Fibrous Ingredients (Full Capacity) 
 

6.8
9.3

Crushed Ice 
 

10
8.9

Cleaning 
 

6.0
7.5

Nut Butter 
 

8.1
9.1

Full Comparison

Design

Dimensions 
 

Blender Type 
 

Full Size Blender
Full Size Blender

Box Picture  

Ninja Blender Duo with Auto-iQ BL642 Box Picture
KitchenAid Diamond Box Picture

Height 
 

17.8" (45.2 cm)
16.8" (42.6 cm)

Width  

7.6" (19.2 cm)
8.9" (22.5 cm)

Depth  

10.0" (25.5 cm)
9.2" (23.3 cm)

Weight 
 

8.8 lbs (4.0 kg)
9.6 lbs (4.4 kg)

Shaft Length (Immersion Blenders) 
 

N/A
N/A
Show Text 

Build Quality 
 

8.0
7.5

Build Quality Picture  

Ninja Blender Duo with Auto-iQ BL642 Build Quality Picture
KitchenAid Diamond Build Quality Picture
Show Text 

Jar Capacity 
 

9.8
8.4

Main Jar Capacity 
 

72.0 oz (2,129 ml)
60.0 oz (1,774 ml)

Additional Jar Capacity 
 

32.0 oz (946 ml)
N/A
Show Text 

Jar/Beaker Materials 
 

Jar Picture  

Ninja Blender Duo with Auto-iQ BL642 Jar Picture
KitchenAid Diamond Jar Picture

Optional Jar Picture  

Ninja Blender Duo with Auto-iQ BL642 Optional Jar Picture
KitchenAid Diamond Optional Jar Picture

Jar/Beaker Material 
 

BPA-Free Plastic
BPA-Free Plastic

Dishwasher Safe 
 

Yes
Yes
Show Text 

Blades 
 

Blades Picture  

Ninja Blender Duo with Auto-iQ BL642 Blades Picture
KitchenAid Diamond Blades Picture

Blade Type 
 

Sharp
Sharp

Blade Count 
 

6
4

Removable 
 

Yes
No

Dishwasher Safe 
 

Yes
Yes
Show Text 

Lid 
 

Lid Picture  

Ninja Blender Duo with Auto-iQ BL642 Lid Picture
KitchenAid Diamond Lid Picture

Two-Part Lid 
 

No
Yes

Lid Closing Type 
 

Lock Mechanism
Friction
Show Text 

Power Cord  

Cable Picture  

Ninja Blender Duo with Auto-iQ BL642 Cable Picture
KitchenAid Diamond Cable Picture

Stow-Away Compartment 
 

Yes
Yes

Cord Length 
 

2.6 ft (0.8 m)
3.8 ft (1.2 m)
Show Text 

In The Box  

Bundle Picture  

Ninja Blender Duo with Auto-iQ BL642 Bundle Picture
KitchenAid Diamond Bundle Picture
Show Text 
Performance

Fibrous Ingredients (Small Batches) 
 

9.3
9.7

Fibrous Ingredients (Small Batches) Photo  

Ninja Blender Duo with Auto-iQ BL642 Fibrous Ingredients (Small Batches) Photo
KitchenAid Diamond Fibrous Ingredients (Small Batches) Photo

Jar Used 
 

Additional Jar
Main Jar

Fibrous Ingredients (Small Batches) Video  

Fibrous Ingredients Processing 
 

8.5
8.5

Fibrous Ingredients Texture 
 

9.5
10
Show Text 

Fibrous Ingredients (Full Capacity) 
 

6.8
9.3

Fibrous Ingredients (Full Capacity) Photo  

Ninja Blender Duo with Auto-iQ BL642 Fibrous Ingredients (Full Capacity) Photo
KitchenAid Diamond Fibrous Ingredients (Full Capacity) Photo

Fibrous Ingredients (Full Capacity) Video  

Jar Used  

Main Jar
Main Jar

Fibrous Ingredients Processing 
 

6.0
8.5

Fibrous Ingredients Texture 
 

7.0
9.5
Show Text 

Crushed Ice 
 

10
8.9

Crushed Ice Photo  

Ninja Blender Duo with Auto-iQ BL642 Crushed Ice Photo
KitchenAid Diamond Crushed Ice Photo

Crushed Ice Video  

Crushed Ice Preparation 
 

10
8.5

Crushed Ice Texture 
 

10
9.0
Show Text 

Nut Butter 
 

8.1
9.1

Nut Butter Picture  

Ninja Blender Duo with Auto-iQ BL642 Nut Butter Picture
KitchenAid Diamond Nut Butter Picture

Nut Butter Video  

Nut Butter Preparation 
 

6.0
8.5

Nut Butter Texture 
 

9.5
9.5
Show Text 

Noise 
 

7.4
7.8

Noise @ Max Speed 
 

91.4 dB
89.1 dB

Noise Video  

Show Text 

Blade Speed 
 

Min Speed 
 

3,200 RPM
4,000 RPM

Power 
 

1,200 W
671 W

Max Speed 
 

4,600 RPM
11,500 RPM

Speed Adjustment Based On Jar Type 
 

Yes
No
Show Text 
Ease Of Use

Controls And Programs 
 

Control Panel  

Ninja Blender Duo with Auto-iQ BL642 Control Panel
KitchenAid Diamond Control Panel

On/Off Switch 
 

Yes
Yes

Speed Presets 
 

3
5

Hot Blending 
 

No
Yes

Speed Dial 
 

No
No

Pulse/Turbo Mode 
 

Yes
Yes

Programs 
 

4
1

Blending Time Indicator 
 

Yes
No

Programmable Timer 
 

No
No
Show Text 

Cleaning 
 

6.0
7.5

Self-Cleaning Video  

Cleaning Video  

Show Text 

Check Price

Blue Steel
Diamond
SEE PRICE
Amazon.com
Boysenberry
Diamond
SEE PRICE
Amazon.com
Black/Silver
BL641
SEE PRICE
Amazon.com
Cobalt Blue
Diamond
SEE PRICE
Amazon.com
 
Contour Silver
Diamond
SEE PRICE
Amazon.com
 
Cranberry
Diamond
SEE PRICE
Amazon.com
 
Crystal Blue
Diamond
SEE PRICE
Amazon.com
 
Empire Red
Diamond
SEE PRICE
Amazon.com
 
Espresso
Diamond
SEE PRICE
Amazon.com
 
Green Apple
Diamond
SEE PRICE
Amazon.com
 
Grenadine
Diamond
SEE PRICE
Amazon.com
 
Hot Sauce
Diamond
SEE PRICE
Amazon.com
 
Majestic Yellow
Diamond
SEE PRICE
Amazon.com
 
Matte Black
Diamond
SEE PRICE
Amazon.com
 
Matte Gray
Diamond
SEE PRICE
Amazon.com
 
Metallic Chrome
Diamond
SEE PRICE
Amazon.com
 
Onyx Black
Diamond
SEE PRICE
Amazon.com
 
Pistachio
Diamond
Amazon.com
 
Raspberry Ice
Diamond
SEE PRICE
Amazon.com
 
Sky Blue
Diamond
Amazon.com
 
Tangerine
Diamond
SEE PRICE
Amazon.com
 
Watermelon
Diamond
SEE PRICE
Amazon.com
 
White
Diamond
Amazon.com

Ninja Blender Duo with Auto-iQ BL642

KitchenAid Diamond

Comments

  1. Comparison

Ninja Blender Duo with Auto-iQ BL642 vs KitchenAid Diamond: Main Discussion

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