Help answer this – YMCA or USAG programs?

We have our 6-year old daughter in a local YMCA program and are generally happy with it. We have been considering moving her to a USAG gym with a very good reputation. I have two questions: 1) is it really worth it to be able to compete in USAG gyms? and 2) Do you think that her opportunities within gymnastics will be much greater in a good USAG club as opposed to local YMCA?