I own both and also a Marlin Camp 9. The HP and the Kel Tec Sub 2000 both have advantages and dis-advantages. The S2K is lighter, it folds in half for storage or concealment and uses hi capacity mags. My gun uses Beretta mags and I have several 17 rounders, which is nice. Accuracy and reliablity is about the same IMO. I have a replacement (Blueforce) front sight on my S2K and that fixes one of the weak points of this gun. Both are fun and cheap to feed so I rate both guns about equal I guess. The Marlin Camp 9 is more accurate than both.Would be interested in someone here who has both doing a shoot-off and comparison. I want to get one somewhere down the line, as I've heard good things about it, but have yet to see an actual comparison between the two. Thanks guys!