I am and always will be too humble to own cars like these, but here's my simple analysis:
If you usually like to relax while driving, get the Bentley. Or, if you usually have a lot of people with you, for obvious reasons.
If you are hyper and like going fast while driving, get the Lab
This applies to any sedan/sports car combo. If you're into driving, you could get a slightly used Bentley for cruising and such and get relatively cheap track car to totally thrash, like a Corvette, Viper, Porsche, RX7, Lotus, etc.
If you're just trying to be flashy, it doesn't matter at all.