A) That video was amazing.
B) Ten years ago, if you'd asked me which band between Dream Theater and Opeth would have the better decade, I probably would have said Opeth. If memory serves, DT were coming off some albums I liked (SC, BC&SL) whereas Opeth were coming off albums that I loved. However, since then, I think I have liked DT's output more. That has to do with DT releasing some really good stuff, but also with Opeth not releasing anything that totally slayed me. And I don't say that because they changed their style from death metal - I couldn't care less - I just haven't enjoyed them as much.