*facepalm*

I'm always in favor of helping new people with information but this is pushing it. The audacity of someone to ask a question of such simplicity that can be researched within less effort than posting a new question is astonishing.

None the less, view this link to see a side-by-side of specs and info: Chrysler Crossfire Compare - Summary - MSN Autos

If that is too difficult for you to do also, and you've been able to read to this point the main difference is the engine (while the engine keeps the same basic structure some of the internals are different and the compression is different due to forced induction). The SRT-6 engine is supercharged and is a performance version of the Base/Limited Coupe/Roadster. If your talking about cosmetics and things its got different wheels, and a spoiler, front lip, etc. Take a look at it and tell me you don't see the differences. Not hard to spot even to a non-enthusiast. The SRT also comes with only an auto-tranny and other differences in suspension.

In short, the SRT-6 is a higher performance version of the base/imited Crossfire with little cosmetic touches added on and modified driving dynamics.