if you want to know simply which one "I" like better, it's the 5146 hands down in terms of looks and functions. Besides the great look of the 5146, I wanted a watch with annual calendar function. The 5146 not only has month, day, date, moon phase, etc. functions, it also superbly displays them in a beautiful and classy (classic) style. For me, there is just something about its look that draws me to it. (But then, I am different from you because I chose the YG/slate dial version, not the WG.)
The decision as to which one you like and which function(s) you would rather have will depend on your own personal tastes in design, as well as on your own needs and wants. It can be hard making a decision. Sometimes, however, you will quickly be able to decide which one it will be when you try them on.
Good luck in your search.