I've been beating it like a drum for weeks, but I don't think wordmarks belong in logos. At least not crests. The logo should serve as a symbol for the team and be so recognizable as to not require the accompaniment of a written out name. Also the hockey stick and puck don't help very much.
Senators and Islanders? Hand-to-hand combat, my money's on the Islanders.
We'll keep this short. I like the outline of Long Island in the background of the Islanders logo and yearn for some reference to Ottawa in the Senators logo. We can't have everything. Incidentally, if there's something I'm missing in the Sens logo, feel free to comment about it.