The Gigabytes are custom AIB's, note the location of the HDMI not being in the middle.
My opinion is not to spend the extra cash, unless you really want another fan, I don't think you'll get your money's worth, these 10 series are boosting automatically without software involved, they can boost a little further with some software, but either model I don't think the 'factory overclock' for this generation is as important as it was before.
Here is an example, my 1060 came with a "Boost Overclock" to 1830mhz (from the 1500ish NVIDIA), it is currently boosting to 2000mhz. Well past the "STRIX" model (mines a Dual Model), I saved about $80 thanks to price gauging and being "okay" with the less fancy GPU. Money I put into an SSD.
So, save your cash and get the lower priced one assuming it has the features you want that aren't overclock related.