I came from a 12 Pro Max and absolutely notice zero difference from the "pro motion." While my phone may be capable of 120hz, my eyes apparently aren't.
The reception on the other hand is WAAY better. My home is a cellular black hole, I've tried all of the carriers and they all suck to varying degrees at my home. I'm on T-Mobile currently, where I was barely getting 1mbps download and like .05 up. On the new phone, it more readily gloms onto T-Mobile's UC bands and I'm getting 60-130mbps down and like 5-10up. Which now makes the hotspot a viable alternative to my wireless when wireless craps out.