Regency Lexicon.

PHAETON

A four wheeled carriage usually having the front wheels smaller than the rear ones. It also had no side protection and left the gentleman's trousers or the lady's skirts open to flying mud. A very high seat, so high that one had to use a ladder to get into it only added to the phaeton's outre looks. A phaeton was drawn by two or sometimes four horses and came in several styles. ( http://www.likesbooks.com/carriages.html )

CURRICLE

The race-car of the regency. A curricle was a two wheeled carriage with a folding hood for protection from the elements. It was light and speedy, it was drawn by two horses and quickly became the carriage of choice for the fashionable young man about town. The curricle was a good vehicle for showing off your driving skills, and showing off your perfectly matched pair of horses. ( http://www.likesbooks.com/carriages.html)