ok, cars are basically the same with obvious differences due to wheel base/power/weight. being able to adapt to that within about 2 hours of driving, a few laps is not enough to really get a hold of it since you do not have enough track time to 'test' different speeds/angles/shift points/etc.
now yes for driving a car, a good driver can aggressively drive any car they get into. to drift any car it is part driver, but you cannot be doing it that well right away if its a totally different car. You can EASILY drift the car immediately, but that doesn't mean its gonna look good/correct.
good luck tho, i mean, matt only gets to drift his car (at speeds my car tops out at) a few days every month about. im sure he has to worry about proving himself to you. you however, better combo that track pretty quickly or youre gonna look funny with your foot in your mouth.