I think the Olympus xz-1 looks like a better camera vs the x10
Except they forgot to give it a viewfinder. That's a non-starter for me.
You're certainly welcome to your own opinion and requirements - for sure.
For completeness, I would just point out that -
1. You can buy an EVF for the xz-1
2. As I understand it, the x10's optical viewfinder is like most compact cameras viewfinders - 85% coverage so not 100% coverage, parallax errors (center is not center) as you zoom, doesn't look through the lens (unlike a dslr), no shooting info displayed in it like on a dslr so you still need the back screen for manual settings, etc etc.