When it comes to the difference between the Mustang GT and V6 tail lights, there are a few key things that set them apart. For starters, the GT has LED taillights while the V6 has standard halogen bulbs. Additionally, the GT’s taillights are slightly larger and wider than those on the V6. Finally, the GT’s taillights have a more aggressive and sporty look overall thanks to their blacked-out housing.