No, the coils are not interchangeable. When I get going, I tend to chain vape and decided that 42 watts was a little warm at times and now I vape the 0.5 ohm Clapton coil @ 25 watts with the tank air just about 1/2 way open/closed. Perfect at this point ... for me.
In fact, I was just enjoying the Aspire Odyssey this evening. It is part of a group of four setups that I use daily. The Aspire Odyssey Mini is in a box in a closet LOL. The full size just performs best for me and of course the juice capacity is greater in the full size.
The full size Triton has ample openings in the chimney for wicking and the wick openings on the coils are much larger than most of this coil type. I found it works best if the chimney wick openings and coil wick openings are aligned. That MAY mean the base of the tank isn't screwed on as tightly as it might otherwise be. Regardless, I've not had a single issue or hint of a leak whatsoever.
The complaint I had with the Triton fill feature developed to a point where I had to use pliers to remove the top from the tank each time I filled it. That was rapidly turning into a show stopper for me and I reached out to the community for a possible solution ... and got one !!! Filling is no longer a problem. While the fix worked on the full size Triton ... it doesn't work for the mini. A discussion of the problem and fix can be found here ...
Aspire Triton v2 would be perfect ... if.
The 70 watt Pegasus mod itself is plated top and bottom. The chrome base has a couple of wear spots already where copper(?) is showing through on the bottom, from sitting upright and sliding as I use it at my desk. No big deal but thought I'd point that out. The chrome plating must not be very thick. The unit has only been in use a couple of weeks.
Speaking of plating, the Mini I have is the rose gold colored one and the plating/metal always seemed to have an "off" taste to me. But that's probably just me and MAYBE the saliva exposed metal composition not playing/reacting nicely with metal dental work I have. Wasn't a real issue though. I preferred and used a different (delrin) drip tip on it anyway.
I don't have large hands by any means, but the Mini has always felt too small and mine is kind of slippery a bit. The sensation was that of trying to hold a small fish LOL. The full size is much more comfortable in my hands but does weigh quite a bit more if light(er) weight portability is a primary consideration.
Good vapor density and casual vapor volume is easily obtained from both the full size and mini. I just prefer the full size to the mini. But in that regard, neither disappoint.