The C2 is pretty similar in performance but actually loses a few features like black frame insertion on 120hz content. If you buy a 55" or larger C1 that was made towards the end of 2021 or anytime in 2022 it's likely going to have the same EVO panel as the C2. The C2 will likely get software updates longer than the C1, but LG has been pretty good about updating their OLEDs for a few years so it might not matter. You can't go wrong with a C1. The only thing about the C2 that I'd prefer is the stand puts the TV a bit higher off the table, so you can put a sound bar or center channel in front of it more easily.