I'm a recovering carbon steel snob and have to admit that Opinel's Sandvik 12C27 is going a long way to making me a convert to stainless. So long as we're talking about fine grained steels here (and not things like D2 or 440C), I find Opinel's Inox to perform like a good carbon steel (considering Schrade USA's as good).
The trick with stainless is that heat treat really matters, and heat treat is done differently by different knife makers. So you can't just say 440A is bad or 440C is good. You really need to know which company you're talking about. Add to this that different base steels do have different feels to them. And lastly, most knife makers use only 1 or 2 types of stainless.
What this means is that "best small, stainless pocket knife" means that you need to look for the intersection of blade material (and grind) and frame pattern that you like. I love Opinels and really like their version of Sandvik 12C27, so I'm a happy camper. But, Opinels aren't for every body.
I really dislike Buck's 420J2 and their hollow grinds. I wouldn't get a Buck slip joint for this reason. I do like their 420HC a lot though (but still don't like the hollow grind).
I don't like Case's SS as much as either Opinel's Sanvik or Buck's 420HC and find it a bit hard to hone due to wire edges. But it isn't utterly horrible.
I like Schrade USA (old ones, not the current ones) 440A "Schrade +". But, you may encounter problems with Swinden key construction on them.
I like 440C in general but it can be a pain to sharpen. I prefer Sandvik 12C27 for the finer grain, but that's a whim. Definitely different flavored steels. GEC uses 440C.