Dude, that's SO wrong. They're similar, but really nothing like. And in 1 more album, it won't matter, since Shadows Fall is determined to move closer and closer to metalcore, whereas BTE is much more interested in reawakening the more traditional styles of metal they grew up on.
Not to mention, BTE has been around just as long; it all came down to Shadows being seen by the right person at the right time, and voila! Century Media pushing them through the roof, while Metal Blade has been sleeping on BTE. Only time will tell...