Yeah, other than specs on paper, they are pretty dissimilar. Some folks say the Inova has good throw, but I never noticed it. I mean, it has a tad more throw than the Ultra, but I think because the beam is so well defined, it seems to have quite a bit more throw. But the zero (or at least very, very minimal) spill of the X1 makes its use pretty limited.
I think for a general small, economical EDC, the Ultra makes more sense for most tasks. The X1 is a very cool light, don't get me wrong. But for walking around the house (or a building) at night, the Ultra is definately a better option for most folks.
But as usual, the official answer is, 'Get both!' /ubbthreads/images/graemlins/grin.gif