Both have the same sensor, the only pros of zve10 is the lower price and have a better color science because it's a newer camera. The rest a6400 is better in all aspects.
I personally would stick with HLG3/BT2020 just because it's an 8bit camera and HLG3 should work better with that. (also just stabilize the footage in catalyst browse)
nice choice of aspect ratio and the colors and tones in this were on point. Keep making more! btw I create short films and I've recently filmed a portrait of a young painter I met in Sweden. If you don’t mind dropping by and taking a look I’d really appreciate it! Thanks :)