That is an interesting question as I love both places. Last year no one else wanted to eat at the plaza so I made an ADR for one while they bagged a spot for the christmas parade, then after a delicious club sandwich I went and joined them. I may have to do the same again this year!
We have had lunch at BOG but only do dinner now as we like to meet the beast. The first year we had lunch (? 4 years ago) it was a bit chaotic, the following year it seemed more organised. We enjoyed the food, I had belle's beautiful dinner, as I wanted a dish that didn't involve bread but did have veggies, and the cupcakes and orange chocolate eclair are tasty but small enough not to weigh you down.
That hasn't helped you at all, has it? Sorry