Except none of these tests used the Oasis water-cooler, all of them were done on air. It wouldn't have mattered much in GPU-bound scenarios anyways, because most of these laptops have no issue sustaining 175W on the dGPU—it's the CPU that water-cooling would make the largest difference in.

GeForce RTX 5080 laptop with water cooling system is a respectable 25 to 35 percent improvement over average value of RTX 4080 laptops in pure rasterization
Fixed.

The RTX 4000 series also supports DLSS4. Only MFG 3X and 4X are exclusive to the 5000 series