BLT and SSR both have low dues. But SSR is literally the last resort to fill with reservations. I can't think of a single time of year where you couldn't book at the 7-month window. (I haven't checked, but there's a good chance you can even find availability at SSR for this coming week. It typically has that much space.). BLT, however, fills up, at least for the busy times of the year, so the 11-month advantage is important. It also has monorails, boats, and busses--and you can walk to the MK. SSR mainly has busses, though you can take the boat to DS. It seems a little pointless, as DS is right there, but it's an option.