Just as long as you're willing to take your time to find out what makes your partner go wild it will not make a difference. Enjoy what you do and they'll enjoy you doing it
Never had a real cock so can't really make a decision here but I've got to say that tounge and fingers have always been enough for me so I would have to come down on the side of tounge cus i have never felt the need for cock.
Let's see how well I can do using both.