It's hard to know for sure, but the opinion I've heard most often from program directors is that the regular match will likely increase competition for spots for 2 reasons--1: you'll pick up some people who "discover" ENT late in 3rd year and who still have time to apply, and 2: co-applying to general surgery is a lot more difficult, and the ENT application group will therefore be more highly self-selected. In theory, I guess you could still co-apply in general surgery, but I think the interviews would start to conflict.