I have both a Tomcat and a Guardian .380. The Tomcat sits on a shelf, although it was my everywhere gun for about a year. It's lighter, of course, but the .380 is a better use of space, if you will. Trigger pull on the Tomcat is better. Accuracy is about the same (you have to have realistic expectations in this area). When I first got the Guardian, I shot 100 rounds through it during the first range session. My hand was sore for about 2 days after that. The recoil isn't really that bad, except that the gun butt is driven directly into the middle of my palm during recoil. As far as I'm concerned, this isn't a prolbem, I'll just fire 20 or so rounds per range session. The trigger takes some work to get used to and the sights are downright awful (these are point and shoot guns anyway). If I can part with it long enough, I'll have NAA's gutter snipe sights insalled to correct this.
The only real complaint I have against the Tomcat is the back of the slide is VERY SHARP, especially for those of us with meaty hands. I have scars that kind of look like snake bites. Stay with the factory stocks. I haven't seen anything slimmer, though I have tried Pearce grips and didn't like them.