I don’t know about 749s (although I nearly bought one before decided on the 916SPS) but I would think that it would be a better ride from a performance and reliability point of view, and even a dyed in the wool 916-ist like me doesn’t mind the looks of them these days.
So 748 if you want to look at it, 749 if you want to enjoy the ride more often.
Let us know which way it goes.