We LOVE Whispering Canyon, kids seem to really enjoy it. The food is excellent, the atmosphere is LIVELY, perfect for kids, wait staff are awesome, you can't go wrong there. Good luck with your choice.
I did not vote because I've not been to either. We are trying Boatwrights on the next trip because we are staying at POR and did not want the hassel of transportation to another resort our arrival day. I would take into account travel time.