I'm only in the first part of ToB right now (doing the Yaga-Shura temple), but my impression has been: "Aha, this is BG2 meets IWD."

Seriously...I felt like I was back in Dragon's Eye or Severed Hand, where you get swarmed with about eighty bazillion opponents and it's mainly hack and slash and battle placement rather than exploration and storyline...also extremely linear, like IWD.
Don't get me wrong...I love IWD for a cool dungeon crawl game. It's kind of weird, though, to change horses in the middle of the stream from what I saw in SoA and what I now get in ToB.
Graphics don't bother me, and the dungeons I've seen, so far, have been well-designed. More traps than you can shake a danged stick at, but my guys are so beefed up now and with such high resistances that they practically trot over them, then go back and disarm them as an aftersight. (Shades of IWD there again...so many traps everywhere!)
Overall, yes, I liked SoA better, but I am enjoying ToB. It's just taking some getting used to.