The difference is big, I can tell you by modding PC version of 2k20, 3d models for player are much more improved (you can see this by looking at the shoulders whuch are more round and the vests that have no more polys corners) as well as animations (more and better blending) , 3d enviroment model improved considerably (look at the basket and the net 's physic), NPCs (coaches, referees, bench players) 3d models are hugely improved, illumination is hugely improved (to verify Ray tracing), crowd sligtly improved but got more dense and bigger. It' s quite a big jump