I have both and will tell you the
nautilus Mini will fit but it's a pain the the .... to get on and off with the VTR. You must put the coil head on first and then turn the VTR upside down to screw the rest of it to the base. It's the air adjustment ring that does not want to go thru the protective ring. I like the VTR on the job because because of it's low profile. It fits in my cell phone pocket on my cargo jeans perfectly while the taller MVP has the
tank and tip poking up. The VTR fits in my tool pouch nicely as well. I like the weight of the MVP2 and I rarely go over 10 watts with either
device.
If I wasn't concerned about the compactness factor I think the MVP2 would be my choice.