Reunion is our favourite place to stay and I can't wait to get back there. We haven't stayed at Omni Championsgate, but we have visited for meals several times. It's a very nice resort, but Reunion is unique. The whole place is immaculate and the golf courses are stunning.
Something to bear in mind is that you can play golf at the two hotels whether or not you are staying there, but that's not true of Reunion. If you chose to stay there, your menfolk could easily play at Championsgate as well - it's right next door.
Reunion has several pools. The water park is gorgeous.
Of course, you're not really comparing like with like. Reunion isn't a hotel, it's a gated community-cum-resort, so it depends what you're looking for. There's a small bar in the clubhouse, together with a dining room. Now that the Reunion Grande is open (is that where you're planning on staying, rather than in a condo or home?), there are some additional eating options.
Just don't tell too many people about it.
