So while most teams have are at least halfway through the tournament, these two aren't. The Bruins actually have the fewest overall, this being only their fifth. So we'll be seeing them a lot in the final weeks of the competition. As far as aesthetics, the Bruins logo is simple and strong. Though it may not seem like it, the recent update makes a big difference. I hear a new Senators logo is in the offing and I wouldn't be sad to see this one go.
Bruin mauls Senator. That would be an interesting newspaper headline.
This is where the Bruins are unable to sweep. I see a "B" there which could stand for Boston or Bruins, but nowhere do I see an actual bruin. For that, you have to look to the new shoulder patch, which personally, I'd rather see on their crest. The Senators is as close as we'll come to logo that's appropriate to the name.