Welcome Livi!
I have the MVP, but neither the Tesla nor the Vamo. MVP is a self-contained battery. 3.3-5.0V or 6.0-11.0W Can't really fire much below a 1.2-ish ohm coil (tho there are those out there who've fired a 0.8ohm coil.) MVP is box-shaped; Tesla/Vamo tube-shaped. Picking a new PV is really about pros/cons about what you want from
vaping. I'm somewhat in the hunt for another PV myself, but I'm thinking if I do anything, I want a slightly higher-powered device. I build my own
coils, but rarely below 1.7 ohms (at this time) I like that the MVP is a pass-through device (vape while charging) where the others I'd have to swap out
batteries. I'm 99.99999999% sure that I want a regulated device (safety's sake).
So, do you want to sub-ohm? Do you like a tube or a box? Do you want both VV and VW, or is VV sufficient? Do you want to replace the batteries? Do you want to be able to vape while charging?
It's mostly about defining the parameters of what you want from your gear in order to narrow the search field. I'm in the same quandary as you

Happy hunting!