Some users are reporting that the VRR update also increased the brightness. Please re-check the brightness values when possible. There seem to be some differences between the NA and EU variants, as most NA reviews say it’s 700+ nits, while most EU reviews say it’s 800+ nits. It’s possible the update brought the 2 variants to the same performance level. The thread below has some mentions of this: https://avsforum.com/threads/2021-sony-bravia-xr-x90j-owners-thread-faq-no-price-talk.3190601/page-166