New detailed 10 bit vs 8bit GH5 test by the German Slashcam site
8 Bit vs 10 Bit Panasonic GH5 vs GH4 – the difference
If you can read German I suggest you to check out the ongoing GH5 testing by Slashcam:
Test : Panasonic GH5 Sensor Verhalten – Auflösung, Slowmo, Rolling Shutter
Praxistest : Panasonic GH5: 10-Bit 4K V-Log L Workflow, 180 fps Zeitlupe, Focus Transition u.a. (1)
Kurztest : 8 Bit vs 10 Bit: Panasonic GH5 vs GH4 – der Unterschied in der Praxis
I will not give you the google translated links as it really makes a very bad translation. But so far they are very impressed by the performance! And they certainly see an improved on the 10bit footage as it has less banding than 8bit.