There is no difference in how resale and developer-bought units are treated. You can change your reservation without issues 12-8 months before arrival. Between 8 months and 61 days, you are not guaranteed the view (where I own - WKORV - you could theoretically get an island view unit, instead of ocean view. You might keep an ocean front reservation, since those cost more points to reserve. I don't know the setup at Lagunamar), but you can make changes as you wish. Between 60 days up to the last day, you can make changes, but there are fees, and you are restricted to make new reservations only within 60 days of the desired arrival date.