The two seem to be pretty similar, but was hoping one of you had actually heard them both. Any thoughts?

Mac, it may be unlikely that any of us have heard both under any circumstances, and for even a reasonably fair comparison they'd have to be heard at the same time in the same place on the same material and adjusted to the same volume level(not necessarily the same setting on the volume control). Still better would be conducting the comparison in blind testing.

There's little doubt that the SVS Ultras are also fine speakers. The probably relatively subtle differences that exist couldn't be fairly judged by just "hearing" the other at a different time and place.