Will this be your daily carry or just something to tinker with? I have both and they both have their strong and weak points.
MVP is more portable, lasts longer between charges, has a micro usb charge port. I have had it lower ohms than the 1.2 ohm limited Vamo.
Vamo looks like a lightning rod in 18650 mode with a tank like the Mega, you need a battery and charger for it, but it does hit better @ 15 watts, at least on my Mega, Tobh, and Magma.
Just got my first Mech Mod (Nemesis) and I can honestly say that I could roll with it and the MVP v2 and leave the Vamo behind. MVP for the tanks, Nemesis for the drippers.