'63 Dart Convertible GT vs 270?

[Soren]

Until the other day, I thought that all '63 Dart convertibles were GTs. Other than the motor (170 vs 225), what is the difference between a convertible GT and 270?

 

[65 Dartman]

The trim level on the exterior and most likely the GT will have buckets where the 270 will have a bench seat.