I measured the external temperatures of the four quadrants of the notebook after 40 loops of 3DMark's Fire Strike Extreme stress test. This amount of time is more than enough to get an idea of your average maximum running temperature for this workload.
The Aorus X9 DT ran fairly hot, despite its four fans and the ruckus it kicks up. At 25.4mm at its thickest point, I'd argue that it's actually quite thin for what it offers (the MSI laptop is also a lot thicker), so it may be that cooling has suffered slightly as a result.
I used the built-in battery life benchmark in PCMark 8 Home to assess the battery life on the laptops.
The Aorus X9 DT actually lasted surprisingly long, probably thanks to its large 94.24Wh battery. For a desktop-replacement class notebook, it's pretty good in the battery life department.
The portability index is an objective measure of how portable a notebook is, taking into account factors like size, weight, and battery life.
Despite its fairly decent battery life, the Aorus laptop was 'dragged down' in our portability index by its form factor and weight. It is, after all, a 17.3-inch notebook and considering this point, it managed to land a portability ratio very close to the ASUS ROG Strix Scar II notebook that has a 15.6-inch screen. Furthermore, it still fared a lot better than the MSI laptop.