Their TC is exactly the same size, and fires down to 0.05 Ohm Ni200 or Ti wire, and down to 0.15 Ohm for Kanthal (even lower than their standard 40W), and the adjustment buttons are moved to the top, rather than the bottom so I've no idea if I'd like that or not, but it is lockable, so you can avoid accidental adjustments. Yeah, I'm pretty picky, lol... and this Presa 40W is in my mind as decent an APV as the Innokin MVP series, but I like the size/ergonomics of the Presa, better than an MVP (and you know how I've praised the MVP-series in the past)! I think this is an excellent starter VV/VW mod, or a great primary or back-up for anyone that doesn't want to deal with 18650's. To me the solid-body construction, and size also beats the iStick 30W or 40W (TC). The iStick 50W only has it beat in battery capacity (2000mAh more), but is more than twice the size (and flimsy), too.... with obvious auto-firing problems being reported... So far, this thing is getting 5-stars from me! But, we'll see how it is in a few months, or a year?