Yes, they are MASSIVELY better… and I have a pair for sale, boxed, in virtually new condition, for £110 posted.
Whether interested in mine or not.. Avid Shorty Ultimates are by FAR the best CX brake set out there.. . I used Shimano canti’s, Froggleggs, Tektros and all sorts of other stuff without much success in the braking department until I finally blew the money on the Avids and boy was I glad I did. They were the first brakes I used that actually stopped the CX bike rather than just scrubbed a little speed off… and they work equally well in the wet, which is something no other canto even came close to achieving.
If you are interested in mine my email is simonpearson AT yahoo DOT com. Only selling as I sold my CX bike.