If the S2 is the model with two triggers, splinter forend, straight stock, then I have an S2 in 28 ga. I like the gun, particularly the handling. When I first got it the left firing pin was dragging on the primer cup, making it hard to open the gun. It was only a matter of time and sure enough on the 95th round during the initial clays shakedown the pin broke.
I was dissapointed but Mark could not have been better about it. The first words out of his mouth after I told him what happened were "This is up to you. Do you want your money back in full or would you like a new gun?"
I chose to replace the gun and Mark even expedited it to me when I told him I was leaving in a week to go to Michigan.
A buddy of mine got a CZ Bobwhite in 20 ga. not long ago and they appear to be essentially the same gun. The Dehann may be fitted a little better. They are filed a bit differently at the back of the receiver. Not sure about the 16 but the CZ 20 (a 26 in. gun)did not have the sweet handling qualities of the 28 which has 28 in. bbls. Not sure how you could get your hands on one to try it.
The 28 is about all I use for woodcock and carries and points great.
SK