one big difference is where you go for replacment parts.
another is performance the 944 brake will be over kill, but in a good way. Braking is one of the best upgrades.
http://www.vdubcustoms.com/
goto products->brake->porsche
there some nice pics to give you an idea, plus lanner is a great guy, did my Rx7 kit. There are different ways and styles depending on the turbo or n/a setup. Also on the home page of the germanlook.com there is a tech article too.