The way I look at it, you're already getting a laptop, sacrificing the greater performance and cooling offered from desktop pc's, so you wouldn't expect it to game nearly as well. I'd opt for the more premium, sleek and sexy looking design, slim and light to carry around everywhere. Of course, you're going to pay a bit more, and the components probably won't be equal to the laptop that's over twice as thick, but it's all preference.
The Razer Blade is gorgeous and the Asus is nearly a truck wheel wedge. On the other hand, if you don't plan on bring the laptop everywhere with you, but you still need to have mobile gaming, AND this is your only gaming machine, I'd probably lean towards the Asus.