I like the mahogany over the exterior teak - hands down. But teak looks nice on the inside, as long as it is oiled

But one other issue about laminating two boards - although your issue appears resolved. The glue line is most likely where rot will occur. On my coamings, where the big block at the forward end joins the boards is where the rot started and then went into the mahogany. For outside stuff, wher strentght is not an issue, use single boards. Forget gluing two together.