When watching HDR content, it’s important to remember that the brightness of each scene is set by the content itself, not your TV. The vast majority of the content you watch will be well under 500 nits, so for the most part, the B1 and C1 would look almost identical. Where you could notice a difference is in small bright highlights, like a streetlamp in an otherwise dim scene, but even then, you’d have to have them side by side to really notice the difference. Due to the TV’s automatic brightness limiter (ABL), large bright scenes (like an explosion or a quick flash of light) are about the same between them.

Technically speaking, neither of these TVs are bright enough to deliver a true HDR experience, since most content is mastered at between 1000-4000 nits. Very few TVs can get anywhere near those brightness levels, but again, it doesn’t really matter since 99% of what you’ll be watching will have an average brightness level way below that.