In general,
DVC units tend to be a little smaller and a little bit less well-appointed than the top-shelf offsite resorts. As an aside, I'm not sure I'd put Orange Lake in the "top-shelf" class.
I would probably include the two HGVCs, two (or maybe three) of the Marriotts, Vistana Villages, and maybe Wyndham Bonnet Creek along with the Disney resorts. For many timeshare owners, trading into those is anything but certain through RCI or II. You pretty much need to own Wyndham to get into Bonnet Creek, because it is very rarely deposited. HGVC shows up more often, but a mediocre trader often will not see it in peak seasons. The Marriott's require a pretty decent quality trader in exchange, and the DVCs have an even more stringent quality filter. Vistana Villages isn't too tough through II, but a mediocre trader often won't see it either.
Orlando is an easy trade, but the better resorts less so.
The advantage of DVC is that it is Disney---inside the bubble, fully integrated with the theme parks, and a seamless experience. Wyndham BC "feels like" it's located on property, but technically it is not. An excellent location to be sure, and we love it there, but it's not seamless in the way the DVCs are.
There is a premium to be paid for this seamlessness. If you are there for Disney, and you expect to be for a good long time, then DVC has a leg up. If you are there for "Florida", or "until the kids get tired of it," well, it's probably not worth the price.