You have to be careful about using Home Depot type flooring. It's made for indoor use and may have serious problems with the temperature extremes you see in a boat.
This product is made for the marine environment as is PlasTeak. NU Teak Decking Inc - Teak and Holly Marine Flooring
The biggest difference is the PlasTeak is sold in sheets, which can be a bit of a bear with all the cuts and curves in a boat. The NuTeak is sold in strips. Make a mistake with one strip and it's not a big deal. Make a mistake with a sheet and you either live with it or replace the whole sheet.