The MK319 is a darker sounding mic than the V67G... the 319 rolls off at about 15kHz or so and V67G doesn't. It seems most people on this forum perfer the V67G over the MC319... and most of the time I think I would too if those were the only mic's I had to pick from. However, I like both the MC319 and V67G, depending on what I want at the time. IMO, the MC319 is more of an off-axis type mic.
I haven't used the v67, but I can say for certain that the 319's are nothing to write home about. Certainly not a go-to mic for an up front lead vocal, though it is useable.