Msi gs63vr does throttle but, not as heavily like the razer blade does, and battery life isn't great like the new alienware 15. The fan noise is way less compared to the razer blade, which keeps it's fan running constantly. On the gs63vr the fan only kicks in when needed, it doesn't constantly run in the background. I ended up returning my gs63vr, cause I couldn't get used the layout of the keyboard, the space bar is big flawed. Meaning you have to press it in the right place, can't press anyway on it. Which pissed me off, other than that, it's a really decent laptop ( if you can get used to the keyboard layout).
edit:Doh, I meant the space bar