I'm trying to decide between the two units. Particularly if the MD unit is worth spending that much more money!
I have two of the mini units and love them! I do an oxygen infusion with my RejuvenAir machine right afterwards. It's two pieces of equipment but less investment than the MD. I work closely with Dermasweep so I don't want to stear you away from the MD if you are leaning that way!! Either unit will be awesome!
I like my hydrafacial unit personally, checked out dermasweep and didn't give the results. should at least check it out.