F1 2015 Questions about Codemasters F1 games

[Azfalt Raser]

1) F1 2011/12 has alot of understeer. F1 2014 has great front end grip, but weird oversteer in sweepers. Does F1 2015 - 16 have the same oversteer characteristics?

2) I wanted to combine all the different tracks from different Codemasters F1 games, so I have more tracks in 1 game. Is that possible? (add Istanbul from F1 2011 to another F1 20xx game....)