Deciding on Z170 motherboard features

[gimmethedonut]

I am deciding between these two motherboards:

http://www.newegg.com/Product/Product.aspx?Item=N82E16813132573 (Gigabyte z170mx-gaming 5)

http://www.newegg.com/Product/Product.aspx?Item=N82E16813132573 (asus z170mm-plus)

Can anyone give me a rundown of the two and why one is better than the other? What features one has that the other doesn't and what this means in practical terms, would be greatly appreciated.

 

[Suztera]

The ASUS only support 2 way crossfire.
The gigabyte support both 3/2 Way crossfire and 2 way SLI.
Some minor difference with the back I/O ports.
You also get a metal brace on the pcie slots to help rigidity on the gigabyte.
Obvious the gigabyte is better overall hence the price difference.