The short answer will always be to shoot the gun that fits you the best and you're most comfortable with. Nothing else matters when a gun doesn't fit. As for a dedicated trap gun, five years ago I would have gone with the Trap junkies and said you need a "real" trap gun. Today I don't believe that. For singles (16 yd), almost any gun will do provided it fits well and shoots where you look. However, in the long run, if you do a lot of target shooting, you will either want a heavier gun, an auto, or a gun with a recoil system. Recoil is a cumulative problem. Eventually your brain will rebel if your gun is beating you up.
I've never shot a Nova pump, but I do shoot a few thousand targets a year with my Super Sport. Despite having several "real" trap guns, I really prefer shooting my Benelli these days. It fits, it's comfortable, and I take it in the field for Dove and Pheasant in the fall.
If you do eventually become a Trap addict, you will no doubt want that $10,000 Trap gun to help you get back to the 27 yd line, but for casual target shooting from 16 yds, you don't need it.