Granite is natural stone, quarried and cut into slabs. Quartz countertops are engineered: crushed quartz bound with resin and pigments. Both are hard, durable, and handsome, and both are good choices. The differences show up in the details.
Heat is the first one. Granite handles a hot pan far better than quartz, whose resin can scorch or discolor under high heat. You should still use trivets with either, but granite is more forgiving when someone forgets.
Sunlight is the second, and it matters in Florida. Resin in quartz can yellow over time in strong direct sun, which is why quartz isn't recommended for outdoor kitchens or counters under a sunny window. Granite doesn't fade.
Maintenance is where quartz wins: it never needs sealing. Most granite benefits from sealing about once a year, which takes a few minutes with a spray-on sealer. In exchange, every granite slab is one of a kind, with movement and depth that engineered stone imitates but can't quite match.
If you want a uniform look and zero upkeep indoors, quartz is a fine choice. If you want natural stone, heat resistance, and a countertop that will look the same in twenty years of Florida sun, granite is hard to beat.