I find it interesting that they are giving it a distinct name. As, it claims to be the same frame as the R3. Unless the fork is significantly different, it's an R3 with a 105 (11-speed) grouppo.

I think they upgraded the R3 frame significantly this year, maybe they are going to introduce an even more significant change to R3 next year. (R3 Mud... or R3CX..?)