Personally I prefer The Architect to FBTE, Veil, or any of their other epics really. Sure, a lot of their longer songs have done the "quiet section in the middle followed by a big buildup" thing, but that section in The Architect at least has a very different vibe to it. And the part with the Leprous vocalist is great, though I can see how it'd be a bit much for some listeners who don't like those kinds of vocals.
EDIT:
Veil actually feels a bit different from FBTE for me, the calm section has a different vibe I guess. The Architect is definitely similar in my book, though.
Heh, it's the other way around for me.