In theory doggetts method is better. HPJs only calculates on a 512* sheet. If you downsize a 2048* to 512* youre going to get bleeding which will alter the result. And thats not mentioning 4:2 aspect textures...

Yeah but who is seriously gonna do that? =/

Calculating on a 512 and then the same on a 2048, I shouldnt expect to see more than a 1% difference, as its still the same used:wasted space ratio

Due to rounding, there would be differences in the decimals. The only difference with the larger size is that its a higher wasted pixel count (higher used pixel count also)

Maybe I should use it fore assessments! anything below 75% is a fail.!

Now you just need to write a script which tells me how artistic the model is and I'm done