I personally prefer the Type B with a regular cartridge (non-tank). No leaks, better wicking, and great hit + vapor. I'm not super jazzed by the EMDCC, but then I kind of hate cartomizers generally. They're great on the first fill but progressively worse thereafter. Of course, I use 100% VG so that might be part of the problem. Type Bs are very consistent and last quite awhile unless you try to dry-burn or clean them excessively. The real benefit, imho, is a throat hit unmatched by anything I've tried so far. But they do flood easily, so tank systems can be a problem...