The Sabertooth is actually better equipped for cooling purposes as it has a fan over the FSB / Northbridge. However, that can also result in increased cleaning as that fan will get dusty every 3 months or so.
The Hero VII, on the otherhand, is clearly optimised for gaming. ASUS has tweaked the BIOS to allow for very simple overclocking with preconfigured profiles in place to allow for component overclocking by set percentages. This is convenient if you don't want to take the time to tweak overclocking settings yourself.
The Sabertooth has the other slight advantage over the Hero VII in that it allows slightly more room around the CPU Socket, so you can more conveniently mount a large CPU air cooler. However, with so many closed loop CPU water coolers on the market today (NZXT Kraken X-41 / X-61, Corsair H100i / H110i etc.) this may or may not be an advantage.
The Hero VII allows for much faster RAM to be installed, which can be advantageous at the bleeding edge of gaming. Expect your Graphics Card / CPU to bottleneck well before your RAM speed does, however.
Ultimately, it's your decision.