Not familiar with DC mids, but from what I've heard the vector isn't quite as OS as the wasp. (also from what i've heard) the comet can be a tiny little bit on the under side of stable? The axis, depending on how flat it is, will have different flights. The domier pink ones have a little more fade and moderate domed ones have a small late fade. Both have 0 turn to them. The super flat ones have a touch of turn to them and very very little amount of fade. They'll hold a hyzer and anhyzer very well. The Ions are my favorite disc from MVP. The late opaque (3rd) run and the current candy (4th) run both have similar flights. Very stable (straight) at high speeds (such as a drive) with a nice predictable fade. They'll hold any line you put them on. Softs are a little more stable than mediums at lower speeds.
Hopefully I answered your request. Any more questions that you have feel free to ask!