I like to imagine it thus:
Interceptor is how you fly after downing 2 litres of Red Bull energy drink.
The corvette is sitting back with a cigar and a smug look on your face knowing that it doesn't matter when you arrive, for when you do, all shall become ashes before you. (At least, once weapons are properly implemented it will!)
I'm growing to like the corvette's flying style but I hope it comes with a warning for new players when the time comes: Handle with care, this flies like a house, not a mosquito! We have the luxury of repeatedly smacking into planets as much as we like at the moment but I suspect that won't last forever, gameplay-wise.