So much about guitars is personal preference...all the way from looks, to feel, to responsiveness. All of these things can very from guitar to guitar, even within the same model range.
That being said, with the little bit of information you mentioned (being a finger-picking blues player), it sounds like you're not looking for anything more than the basics. With that, I'd recommend the McCarty. The pickups in the McCarty will be a bit more mild than what's in the Custom 22 (provided the pickups haven't been changed). Plus, the korina is super light weight, breath-y in tone, but still packs a bit of punch.
The Custom will lend itself a bit more to the rock genre. I can't recall if in '98 they made Custom 22's with stop-tail bridges or if it'll be a trem system, but that is also something to think about. I do think that the Custom 22 will have a thinner neck profile than the McCarty, so again...another thing to think about.
Either way you go, I don't think you'll end up disappointed by any means. They're both incredible guitars with quite a bit of versatility within their tonal spectrum.
Good luck!