Alright it's down to the Lavatube or the Apollo V-tube, really leaning towards the Apollo V-tube mainly because of the price....thoughts...?
They are the exact same device, just with a different name. When they first came out, Volcano had exlusive rights to sell them in the US. That contract has since ended and thats why you see them from many different vendors now, just with different names.
The only thing that matters between them is price and warranty.
Different sites offer different warrantys and prices, even though its the exact same device. Ive seen some sites that only offer a 2 week-1 month warranty, and others that have a warranty alot longer.
Apollo seems to be a really good place to get the Lavatube (V-tube, VRVV, etc etc etc and whatever else someone wants to name it) right now. They have it on sale so its only $59, while most others sell it for $69 or $79. Also and more importantly, Apollo has a really good warranty on it, and theirs is longer than any other vendor Ive found. They have a 30-day money back guarantee, and also a 1-year warranty. Thats pretty damn good, since I saw another vendor that only offered a 14-day warranty and no money back guarantee.
As far as what the lavatube can run, it has a feature in it that will automatically lower the voltage if your trying to use too high of a voltage on too low of a resistance carto. Its basically just stops you from popping the coil on the carto and/or ruining the carto bc you tried to use too high of a voltage for that specific ohm carto.
With the BuzzPro or IPro, it wont lower the voltage, and basically both devices will allow you to burn a carto or pop the coil if you really want to. So on the lavatube, its really just a safety feature that stops you from ruining your cartos.
Personally I wouldnt not get the device because of that. I dont know if youve tried a VV device before, but I think youll realize when you do that you wont want to use LR cartos that much. Using them basically just defeats the purpose of having VV. If you use a 1.5ohm or 1.7ohm, your not going to want to go much higher than 4.0-4.2V anyway. Its just going to burn the juice and make it taste like crap, and youll also risk popping the carto too.
You can still def use LRs, but I think youll realize that they will only make juices taste good at about 4.0V or lower. Using something like a 3.0ohm carto allows you to use the widest range of voltages. You could use one at 3.5-4.0V for a cooler vape, or if you want a warmer vape like you get when you use a 1.5ohm or 1.7ohm on a 3.7V, just crank up the voltage and you can get that nice warm vape like youd get using a 1.5ohm carto on a 3.7V device