I have a pretty old Acer 27" 4K monitor and its probably not a genuine true 10bit panel, but when I switch from 8bit to 10bit I can see a slight difference overall in colours but is it worth it probably not. I have to settle for 10bit, 4K, 60hertz though due to mini pc specs.
My CX however the 10bit vs 8bit is much more, but this is with hdr which gives much more pop overall.
I would prefer 8bit and say 120hertz though due to eye health either way its time at one point I get an up to date monitor and its gotta have 10bit HDR and 4K 120hertz, shame they are so expensive for now.