I cant say much about the Legacy, I just opened the thread for the first time 30 mins ago... can't say it gave me a warm and fuzzy feeling at all, specifically speaking to the user experience/performance. Build quality seems high, with the exception of the microdosing basket thing, but idk. Aesthetically it looks great though. A couple people seem to have gotten it figured out for themselves and seem to be enjoying it though. Just not my thing.
The IQ2 does seem similar? I can say that the flavor in the IQ2 is amazing IMO. It really brings out the flavor of your flower. Potency and efficiency - I think, depend completely on your lungs. It's been shelved for a couple months so I'm a bit rusty on my thoughts with it, but the main reason I actually found FC was because I was trying to figure out how to get my IQ2 to function better. That said, I realize now that I may have been doing somethings wrong and not using the IQ2 to its potential. I keep meaning to go back and do some more experimenting, just haven't gotten around to it yet.
For me, I just felt like I had to inhale the whole 8 minute session. My lungs couldnt keep up, and in my head, with a conduction vape like this, if I'm not inhaling I'm wasting. I paired it with a bubbler, that helped a lot actually, I was able to inhale more and feel like I was wasting less. I obviously was getting higher than I had before because I was able to get more into my lungs rather than wasting away cooking while I'm trying to hold my coughs in. But still, the oven is really big and I was actually FLYING through weed, probably double what I was doing with combustion to be honest. Picking up some on demand convection vape has basically slowed my consumption to a crawl, even with me vaping daily.
Again though...I know a lot more about vaping in general now compared to when I was using it. I basically knew nothing about vapes at the time. I'm sure I could pick up the IQ2 and get better performance out of it than what I was doing before, use it more efficiently, etc.