Is this door solid mahogany or a veneer?

It is described as solid mahogany construction, not a veneer over a hollow core. Solid wood can be sanded and refinished, which veneers cannot.

Does the clear glass hurt privacy?

Yes. Six clear panes per leaf let people see in and out. If privacy matters, plan on a curtain, a film or a different glass option.

Can I stain it a darker color?

Mahogany takes stain well, and many owners stain it to a deeper red-brown or finish it clear. Test on a hidden spot first, since dense mahogany absorbs stain unevenly.

How does it compare with the 4 Lite Mahogany Door?

The 4 Lite has four glass panes instead of six, so it shows less glass and more wood. The 6 Lite lets in more light; the 4 Lite gives more privacy and a heavier wood look.

Does it need weather sealing?

Exterior wood doors should be sealed on all six sides and refinished every few years. Mahogany resists moisture, but unfinished wood will still gray and check.

The listing covers the double door with its glass lites. Check whether the frame, jamb and hardware are included before ordering, since those are often sold separately.