new g20 versus older g20

i was wondering what parts are interchangable between the new and old g20's. are the taillights? grille? any help would be appreciated.thanks!

-brandon

Just for your personal knowledge, the older G20 is called a "P10" and the newer is the "P11"

There are a few parts that are the same, but many need some modification to be swapped from what I understand.