Granite is quarried natural stone, so every slab is different: the movement, the flecks, and the color shifts are all part of the rock. Quartz countertops are engineered, made mostly from ground quartz bound with resin, which gives them consistent color from slab to slab and a surface that doesn't need sealing.
For everyday cooking, the practical differences come down to heat and maintenance. Granite tolerates heat well, although we still recommend trivets under hot pans. The resin in quartz can scorch or discolor under a pot straight off the burner. On the other hand, quartz is non-porous and shrugs off coffee and wine, while granite should be sealed periodically so spills can't soak in.
Sunlight matters more in Florida than most places. Many quartz products carry warnings against long-term direct UV exposure because the resin can fade or yellow. For a kitchen with big west-facing windows, a lanai bar, or anything outdoors, granite is usually the safer choice.
Looks are the tiebreaker. If you want a clean, uniform white or a marble look without marble's upkeep, quartz makes that easy. If you want a one-of-a-kind slab with depth and character, granite is hard to beat. Either way, ask to see the actual slab or a large sample in your own light before committing, and make sure your estimate spells out the material, edge profile, and cutouts line by line.