Are you using the same juice? I find the N2 quite smooth and I think it's due to the tank design, somehow, for whatever reason. IDK though, but the N2 is very smooth, and sometimes so smooth I can "miss" the flavor some, well, that's my theory, anyway. How high did you turn the wattages? Some tanks are just like that. I bought a wismec tank to take the C-cells, and I ADORE that tank, at 1.0 resistance and 12.5 watts, it's a fantastic vape. LIKE the N2, it's a fairly small quantity of eliquid tank, kinda hard to refill even, but like the N2 I am guessing it's a less than 2 ml tank, given that with the N2 there is a fill line.... That may be one possibility, as I tend to find tanks 3 ml or less easier to deal with in a lot ways, even with an easy refill. When I switched my Berserker from 2 ml to 4 ml it really changed the vape, to the point that I am going to have to re-coil it and re-wick it. (Though, things happen when you disassemble a tank, and much did, LOL).
But, size of tank makes a big difference to me somehow, I bought an original Nautilus early on and hated it. Most of the tanks I enjoy aren't huge, and I do wonder if that makes a difference, actually. . Interesting though, and I'm glad you are enjoying testing out your equipment and etc....
Anna