These are the new features EX-1 UR has and the EX-10 Helios does not;
1) faster response "Ultra"
2) can be configured to be a 4 channel system
3) new function called Quick Steering & Throttle for quicker response setting
4) new function called Steering & Throttle Monitor to check the operation. You can also check channel 3 and 4
5) new function called Idle Up
6) smaller steering wheel with the decrease angle spacer (like the Helios C2 but plastic)
7) Key repeat setting, these are short cuts buttons to functions that you assign priority to.

These are the features that the EX-10 Helios has and the EX-1 does not;
1) Custom menus
2) Custom melodies
3) ICS
4) Larger handle and grip
5) Multi angle wheel extension

Hope this helps.

-Robert