I'm going to write up an honest comparison between the two games after I get GT5. I'm saving up for it at the moment. My main focus is going to be on the handling physics. I also want to see how "bad" these standard cars are because there aren't many pics of them in the GT5 photo thread.
Past:'08 E92 335i|ZPP|ZSP|6AT|four (4) HPFPs
Present:'15 Mustang GT|401A|PP|6MT|Recaros
Sig pic unrelated. I like to go sideways and stuff.