One major factor in Xray's favour is the support you have available throught he teamxray.com website where you can discuss any questions youhave about the car directly withthe racing and design teams in their forum...
The support and feedback is pretty much unmatched....
I don't intend this as a slight against Team losi or T. Hodge (it just happens to be when I read the forum...not any sort of rebuttal to Todd)...
This forum is great wtih racers and team drivers from all different areas and manufacturers...but a dedicated forum to suit the unique requirements of your car is a really nice thing to have...
Another consideration is that Xray has carried over designelements from car to car...with many components on the FK05 being compatible wtih the first generation T1's...they don't scrap their designs and start over...they just continue to tweak and evolve...