Not much decision in my mind--Round Head only!! Many codes around the country don't allow clipped head nails. Get the round head nailer you can't go wrong.

i would agree that the full round head nailer would be the safest bet as many codes are beginning to require it...however...they both use the same thickness of nail...the difference in the head size just allows more nails to fit in the magazine of a clipped head nailer...both guns are the same size they just have a different shaped firing piston and different number of nails per clip