Do you have the same graphics settings on both versions? It might be because of that. I've also noticed the graphics on Aerofly 2021 is slightly different than Aerofly 2020.
Are you on the latest version, 21.21, and on ios?
On this new update aircraft textures resolution is better compared to previous 2021 versions, where textures were being reduced for several ios devices.
I noticed this on my iphone11: textures were degraded and have now improved for most aircrafts. Texture quality appears now to be comparable with the iphone 12 pro max, but I would appreciate if somebody could confirm this.
I appreciate the memory optimisations wizardry ipacs must've done to achieve this, thank you.
Also, if there is a graphics setting for controlling texture quality on ios, I couldn't find it.
There are still leftover doubts the textures in the 2021 version are much better quality but as they changed the painting the plane has some blurs and some details that it had before.