I'd get the one with wifi if it's as cost effective as a cheaper board plus a discrete NIC.
The gamer thing is all marketing. Been reading mobo reviews for a decade and have never, ever, seen a single one that came to the conclusion that a gaming board provides any discernable advantage in frames or latency.
Without doing any kind of benchmarking test I would recommend the Hero. What SNA3 said is true, the Audio chip is better, but also the components layout for the audio section is better. The ROG has divided and isolated the audio section from the board reducing with this the noise that other components may add to your audio output. The down side of this selection is that the Hero only has 3 on board 4-Pin connectors for your Sys_Fans, that wont be too much problem either, the majority of the case fans available in the market nowadays are not bigger than 0.4A and each connector on the Hero will handle 1A max, just make sure that you connect identical fans on each header.
Moreover, let's be honest, the appearance of the ROG is way better than the Pro. That Mobo in a side-window chasis simply will rock...
Would be nice if Tom's crew can post some benchmark comparison between the 2 Mobos, that for sure will bring more light into the topic.