I'm interested if they are the same and interchangeable:

motor mount (passenger side)
transmission mount (drivers side)
and the front roll stopper

afaik rear roll stoper is different

 

motor mount different. trans mount different. pretty sure front roll stop interchanges.

 

You sure on the engine side mount?

As I came across this pic of the mounts which does show them slightly different.

 

^ which one is which ?

I can't see any difference though

 

Evo4-6 on the right, evo7-9 on the left.

Maybe a bit hard to see at first but look at where the flat section of the mount is in relation to the bolt hole.

The evo4-6 mount has the flat section nearly inline with the bolt hole while the evo7-9 is much lower.