Yeah, the PC version is the same, tearing everywhere for some reason. I think that is actually some kind of bug that will be fixed.
Once that is fixed the X1 will still be much better than this simply for 60fps (I only get dips when more than 2 titans are on screen).
You can fix the tearing in the PC version by disabling V-Sync in the game's settings and forcing it over the Nvidia control center instead.
I'm playing it on a Macbook Retina hooked up to an external monitor, 900p and settings mostly on low to get optimal frame-rate. Performance is nice for a non-gaming PC.
But yeah, of course the XB1 version is much better than the 360 one. It's just that, the performance still isn't really good so I'm not sure it's worth it.