They have better stain resistance, so they resist dirt pick up and stay cleaner longer.
They have better scuff and wear resistance, so they’re good for high traffic areas and on surfaces that are handled, washed or scrubbed frequently.
They have better moisture resistance, which makes them ideal for surfaces and areas that are frequently exposed to high humidity levels.
They tend to highlight any surface imperfections.
They are harder to touch up than lower sheen paints, because the higher sheen tends to highlight the slightly raised surface of the film where the touch up was done.
They usually need to be sanded, de-glossed or primed prior to repainting, to ensure good adhesion of the new paint.