It may depend on where/when they want to go and how Marriott values the Vistana weeks at. Say someone owns Sheraton Flex and it gets a 32:1 ratio. They have 81,000 options which works out to 2,550 points in the Marriott system. The 81,000 Options would get them a week in a 1BR Premium in Maui any time of the year. However, if we look at the Marriott point chart, it would only get them a Studio in low season.
Similar in Orlando. 81,000 StarOptions would get them a 2BR in prime season at either Vistana Villages or Vistana Resort but at Grande Vista the 2,550 points would only work for a 2BR for about 8 weeks of the year.