There is more difference between 214 and 414, not just a fixed card. I'm not trying to sway anyone one way or the other. There should be at least a few tapes on the archive, listen and decide for yourself.
Fundamentally the 214 is an electret capsule (fixed charge), where the 414 is an externally polarized condenser. I'm not going to dis electrets in general... Earthworks, DPA4021's, and CK1X's are electrets, so electret capsules are used in some very good mics. I'm just saying AKG didn't take a 414 and remove 1 side of the double capsule, which is what I think marketing wants you to think. 214's have a bit of a presence peak, more like the 414 XLII than the XLS... a little bit of AKG sizzle. AKG says the 214 is designed and built in Austria. I think it's a whole new design from scratch, using modern ideas, not necessarily tied to the 414 heritage.
I can see some advantages to the 214's. Some people consider 414's a bit "delicate" for general taping use, and I think the 214 is built to be more "roadworthy". Also, they can run on low voltage phantom (12-52v) as opposed to 48 +/- 4, so if you have a pre (like a littlebox) with a "lower power" setting you can get better battery life.