I've participated in the closed beta in PoE around a year age. (even shop wasn't working back then) With the current developing speed it's gonna be out in like late 2015...
We picked it up again with coste few days ago, and it took us like what... 10 hours and 40 levels to reach (still hardly) challenging part? Besides that, most annoying part of the game was the map reseeding every time we left the area, forcing us to run through the map not even bothering with attackiing mobs just to find an exit... So if you enjoy grinding for hours in a very monotonous gameplay that barely rewards you (gems) then yeah, go play PoE.
I'm on my second Torchlight2 playthrough right now and it's challenging from the very start, playing different character actually feels different. First boss fight took us like 20 minutes.