What we are seeing with Intel is thermal throttling. Finally, even robust cooling options cannot keep up with a 14nm 10 core chip. A 9900k gets a higher score because it's not drawing insane power to get their single core up to unattainable clocks. If you limited the chip to 4.8ghz, it would probably fare a ton better, and maybe even operate in the advertised TDP.
The AMD chip happily follows TDP pretty closely, and dissipating that small amount of heat is relatively easy, even in a laptop. The Intel 65w part is likely drawing 200w, meaning the OEM probably didn't oversize the cooling system enough to account for Intel's ignoring of power envelope.
There are limits to how much heat you can realistically dissipate out of a TIM as small as an i9. And Intel can't abandon it's cooler compatibility (Tim size) without pissing even more people off.