They're really progressive, but I find they can be quite boring; moreso than most progressive bands. If you're looking for some prog metal:
Opeth (they can be quite boring as well IMO)
Ayreon (Really strange metal opera)
You really can't find 2 progressive metal bands that sound the same, because progressive metal can take on so many different sounds. It's a broad genre that allows for a lot of experimentation, so you'll find some prog metal you love and other stuff you just can't stand, even though they're in the same genre.