Thats a pretty tough choice, both are great looking and sounding combinations..
Im assuming you are talking in Taylors only?
I would say it may come down to what kind of tone you are trying to get or prefer, what body shape and size, etc..
If you are thinking of building something new, you may not get to choose, Macassar was off the menu last I heard..
Personally... Redwood and Cocobolo is maybe my favorite combination of all..
Walnut and Cedar is pretty sweet too, if talking about combos!