I have stayed at both..... and for families you might find the rooms at the FS a little too small. That being said, the service, food, amenities and overall feel of the resort was better at the FS, in my opinion. The MO villas, while large are not always great for families (distance from pools, bedrooms on separate levels, bugs!!!). I would suggest you consider a Grand Deluxe Colonial suite, which is close to the lobby and is a spacious 1 bedroom suite.

As mentioned MO is good to Virtuoso / FHR.