Timeshare ownerships mandate how much power you as an owner may have with in the resort. Deeded owners actually own a piece of the resorts interest, meaning they have the right to vote on certain issues (refer to your ownership documentation and it will have further details). Leased owners do not have the same power because they do not actually OWN the property; they just have a right to use it for a certain amount of time. Then the ownership is cut off, some resorts give the leased owners a chance to renew the lease for a few more years, but it is not indefinite like a deed.

P.S. This is why deeded properties are more desirable.