I was just about to say 'go for Ryzen' but then wanted to check first.
Here are two video reviews comparing FX 8350 against Ryzen 1700 and 1400 on some games:
Against 1700 : https://youtu.be/TaPU0gzh3S8
Against 1400 : https://youtu.be/svELJ15PGPQ
Well guess what??
On a GTX 1060 the frame rates are around 5-10% less, but also around 5-10 fps less ALL ABOVE 60 fps !!!
As long as the GPU is GTX 1060 class ( you seem to have two SLI capable NVIDIA GPU's looking at your mobo alternatives) and you already have FX 8350, I don't see any point of switching to Ryzen - and paying additional money for new CPU and new RAM. If you need new CPU though, go for Ryzen.
And for your original question: MSI one. As it has 10 Gbps USB 3.1 port and looks cleaner and more current. Asus one looks like ' 2005 chic' in 2017 - it would be embarrassing to be seen out with that mobo!
Note: all these games have memory usage above 8 GB, so if you do not have already, you might consider upgrading to 16 GB RAM.