User blog comment:Joeboe1998/Best SMG in Modern Warfare 2/@comment-1848120-20100526195523

It's not a waste to put stopping power on the UMP 45 btw. It's actually useful in CQB.

As for your question, i'd say it all depends on usage. The vector has very little recoil and a high ROF, the MP5K has the highest dps in CQB