Jesse, slightly different environment between you and Zo. It seems like he is currently using 8.5, while you are using X1D.
For him, he would get a much more substantial set of benefits than you would, including - for him:
1. Complete redesign of the user interface
2. I believe there is a newer version of Rapture, as well 1.2.2 I think
3. Pro-Channel (BIG-TIME nice thing to have)
4. Automation Lanes
5. Saturation Knob
6. New effects and amp modeler
7. Side-Chaining
8. A BUNCH of little improvements, and a bunch of internal improvements
9. Screen Sets
10. Improved 'Preferences' section
I had X1 and just switched to X2. I find X2 to be quite comfortable, stable, and worth the upgrade. The audio engine improvements alone are worth the upgrade, and the Automation Lanes are too.
As I suggested, since both X1 and X2, (or for him 8.5 and x2) can live quite nicely on the same computer, I would recommend to BOTH of you that you download the trial and test it all out.
Really - give it a try,
Bob Bone