I’ve driven both and of course since the type r wasn’t mine I didn’t drive it as hard as my Si but I can say the Si to Type R there is no comparison. The additional 10-12k is well worth it if you can afford.
You need rear camber arms especially with the D2 drop. Front camber will not be affected as much as the rear. More rear camber will actually mean more understeer and less rotation from the rear wheels.