I own both the FF2 and the IQ. Unfortunately I am in a state where concentrates are not readily available, otherwise I suspect the FF2 would see a lot more use.
For the FF2 I have an external charger and 4 batteries, so power is seldom the issue. I dislike that the batteries are proprietary. My bigger gripe with the FF2 is stiring and the mess it creates. Sometimes I get lucky and my herb comes out of the chamber all in one piece, then I can flip it over and rotate it for the next draw. Much more manipulation than that and you have herbs all over. Did I mention there is no place on the FF2 to store or carry a stir tool? I know someone mentioned the FF2 is discrete, but I disagree. When you’re using it it looks like your smoking a bowl, I don’t consider that discrete. All those issues aside the FF2 is the benchmark for taste, it is a speacial vape that comes out for special occasions.
The IQ is a great vape. I’d strayed from my IQ for awhile, but have recently returned. As it can be palmed it is very discrete. Draw resistance can be an issue, but usually a stir resolves this. The bowl is large for just me, and I consider my tolerance to be above the median. I’ve tried the spacers, but I am not a fan of those and it looks like they could easily be lost. My friends seem to enjoy the IQ, at least if I have the water pipe piece on it rather than the mouth piece. It produces pretty good flavor and can put out thicker clouds the the FF2. I wish there was more of a catch to the top and bottom doors, but that is nitpicking. 10 year warranty is a big plus!
If I had to choose beteen both of these vapes, I’d go with the IQ. I just ordered an Arizer ArGo and the Storz & Bickel Crafty or Might are on my short list. You could do far worse than the IQ.