I vote Chef Mickey's. We did both CM and CP for dinner in April. The food is comparable, but the service we had at CM was MUCH better.
Here is the real decider for me though -- We had to wait over an hour past our 6:00 p.m. ADR at CP. At CM we were seated within 10 minutes. CP had a very hectic atmosphere. Of course, you never know if you may have to wait at any restaurant even with an ADR. At CP you have to wait outside and there is no good waiting area. At CM, if you do have to wait a little while, there is a nice lounge area where you can relax. The kids can run around a little, there is gift shop right there, or you could order a drink from the bar if you are so inclined. With a large group, (especially a hot/tired large group) the waiting area atmosphere can make all the difference.