i've not tried the sE2200 Mkii but i love the original and, to my understanding, the cardioid pattern on the new one sounds the same; very clean, quite bright but very versatile. plus, if you're looking at the one with the multiple polar patterns it makes it even more versatile. the blue mic's have a darker edge to them in general which can be great on nasal/thin vocals and overly bright acoustic guitars.
Both are great mics, i wouldn't say either is "better", just different. What are you planning to record? is it mainly vocals and acoustic guitar? if so, what kind of vocals?
EDIT; to add more confusion, i'd say also have a look at the sEZ3300a (i prefer this to the 2200a and is £199 new from some stores), the Avantone CK7, and
the Rode NT1000. all great mic's in a similar price range to the 2200mkii and bluebird. again, all have their own pro's and con's.
Also, if you can, go out and try any mic's your thinking of buying. if you can't find them in stores, have a listen to some clips online and read as many review as possible (although i can't stress enough that all web clips and reviews need to be taken with a big pinch of salt)
