None of them hit hard....
Do what I did, contact @vapesmarter (I'm sure he'll appreciate the tag [emoji8])
And get a bespoke series squonker......
..... Seriously, does smack you in the face with no apology or remorse! [emoji16] Gotta love his work....
I've had quite a few squonkers, mech included (in fact mostly mech), and I only get the "hard hitting " thing to a point. If you want a fuckton of power get something dual celled and build low. As far as single cell 18650's go they're much of a muchness imo. The only one I ever had bother with was a AKM Ragnarok with a fat daddy 510. I thought it was OK as it was one of my first two mechs until i heard from @city461 and @gravystain who thought it a tad on the tame side (which was confirmed to be the case. The only mod I had to compare was a V1 AMK with an even shittier 510 and I'm sticking to that excuse chaps, I swapped the 510 out for a modmaker and wow, what a difference!!
Sooooo, what I'd say is this......any single cell mech with a decent 510 and good internals is gonna hit pretty much the same from what I've encountered anyway. Bolt, Runt, SQ blah blah bl.......
Agree with what at @geordie said... The question ain't really what hits hardest it's what has the least voltage drop, they all have voltage drop, some more than others...once you hit fire button the battery will put out whatever voltage it has got and it's all about how the mod can deliver that voltage to the coil, through the contacts and the 510... I find anything with a mm510 seems to work pretty well, but the best i have found is something with a moddog 510... Also agree with @the_atomic_fart a series squonker will blow any single cell mech out the water....