We do get a few comments regarding the zipper on the 360 - mainly because people are not used to it.
In terms of fit - the 360 is a little broader in the shoulders, and has more stretch because the stretch panels are slightly larger - you may also find it slightly easier to get into and more comfortable on surface intervals, as you can take the neck seal off, and whear the suit around your shoulders, where-as on the Classic - it hangs around your waist.
The Classic is a great suit too - it is more traditional to what other manufacturers carry. It is slightly more $$ however.
Hope that helps,
Tyler