I have the S&W model & it's a great self-defense blade I think - compact and totally deadly even without training. Also less likely to get you in jail than carrying a longer blade. The handles on mine measure 7/8" thick, so it's not as flat as the Emerson, but much thinner than the bear claw. Not only does it have thumb serrations, but there is a slight hump in the blade for the thumb to rest on, making it extra secure - totally locked in. I think it costs like $25. On the down side, the sheath is total crap, and bulky. You will need to get a strip of kydex and make a new sheath for carrying under a shirt. The sheath is designed to accept a badge case & be worn around the neck on the outside of the shirt, which works for cops but would raise a few eyebrows on civilians. As for serrations, they are BETTER than a plain edge for self-defense - a much more aggressive cutter. Not that you need them considering how evilly hooked the blade is, a more pronounced curve than on the Emerson I believe. It will part flesh like butter, seriously. Order one, I think it's just what you're looking for (& you can probably grind the handles down thinner if you want to).
Hope that helps.
Oh, yeah, that SPOT is butt-ugly!!! But it looks functional.