I can't say for sure. A car service will run you about $110ish, plus tip, r/t. A cab will be at least $50 each way...probably more.
I prefer to book a car service...they'll be there, waiting for you. They'll help you with your luggage. No getting your luggage, then lugging it outside, and then hailing a cab. I just think it's nicer to go with a car service.