^^^ OK, I guess it is really just a semantic difference. When you said "cards deliver in the same exact places as omni's", I interpreted that to mean "deliver a recording of equivalent quality". In my opinion, there are situations where omnis clearly outperform cards, so that's why I said I didn't really agree. And situations which clearly favor cards are the same. Still, there is a broad area in between those two extremes where it really comes down to what you personally prefer, given the venue, music, location, crowd and how the mics will be used. A lot of people post here that omnis require essentially perfect conditions to sound good, but I think, used well, they can give great results in less than ideal situations too (more natural, better low frequency response, better off axis response)…
I prefer to use omnis a (large) majority of the time. A lot of that comes down to the music I record (mostly jazz), the venues (usually pretty small and with decent sound), and the crowds (usually pretty respectful and less wasted than most rock shows). Like I suggested in my previous post, I know that puts me solidly in the minority! I’m not the only one, though…