How can I tell a Dansk original style muffler from a original style performance muffl
 

I am going to the Porsche Swap Meet in Burington CT tomorrow and I am looking to buy a Dansk 1 in 1 out original style Sport Performance muffler. I don't want to come home with the wrong muffler. As best I can tell, the sport muffler has a 70mm tip that is made of 304SS and the original style muffler has a steel tip that is chrome plated. Can anyone confirm the difference? Are there any other differences? Thanks!

I have an original exhaust system on the car now and the original muffler has a loose baffle inside and sounds kind of cheesy when the engine is at idle. When my stock HE's go, I'll upgrade to SSI's with a 2 in 1 out SS Dansk Sport muffler so I don't want to buy a new one or pay full price.