BOG...hands down. The parade is just that a parade. You will be squished in a crowd of people. My kids loved BOG and we saw other parades while at the MK(is there an afternoon one while you are there?). The castle is magical and besides CRT there is nothing like it. The Beast was one of our favorite character meet and greets. We did get lucky with a spot in front of the window so we could watch it snow. It was one of my favorite memories. I can't say that about the parades. They are cute, but nothing to write home about. Everyone will have different takes, so really what is your gut telling you? I'd keep it until the last minute though either way in case you change your mind. Maybe show the kids the youtube video of the parade and then pictures of the castle and ask them what they want.