One vote for VWL here! We have two children too, DS is 6 and DD is 1.
We restled for six months over the same question, and in the end decided we planned more fall and winter trips than summer and that the VWL would be better for us. Then we got a great VWL resale for exactly what size we wanted (250 pts) and things just fell into place. We had never seen either property except for the net and just took our first trip last month. We stayed at VWL and visited BCV. I am very happy with our decision. VWL is wonderful! I can only imagine how great it will be during the holidays. I do love the closeness of BCV to Epcot and it is lovely, but the theming was not near as nice as VWL.
Now, if the villas were at the Yacht Club, that would be different. I love the theming there, I'm a sucker for hard wood, brass and boats.
Regardless, we are convinced we made the right decision and the best thing is, we can still reserve at BCV if we want to, maybe not during the busiest times, but we don't want to go then anyway.
When you make your decision, don't forget to take into consideration when you will be making your trips. If during the warm months, BCV has an advantage. If during the cold months, a beach theme might not be as desirable. Just my opinion.