You could make an argument for either product.

The only thing is if you do it now and then go sailing tommorrow no matter what you use, you will be wasting your time. The resin needs a week to cure to about 90%. A month to fully cure.

So what you need to do is do it now and go sailing next week or go sailing, take it easy and then do the repair when your done. Give it the time to cure as much as possible.

Since this repair (depending on size) is just a band aid and the area will most likely need attention again. I would use the polyester. The polyester will stick to cured poly better than epoxy will stick to cured epoxy. I would thin it a little and add a little mill fibre to it.