comparering qualities

Hello everybody; Recently, I tessted the Unity Labs scene I got from the asset store, and something was bizzard actually with the profiling statistics i got: After drawing box plots, I saw that the low quality took more CPU, and GPU time than the high Quality.

So I tested 05 different other games ( viking village, stealth, Into the Space, Survival Shooter, Tower Bridge Defense) and i got wrong results where good quality box plot take more GPU/CPU time than for the fantastic quality.

So my Questions are: where is the problème ? and if no problem why I got these resluts, it shouldn't be the reverse? is it maybe the rendering pipeline is diffent between qualities, or because the highest quality uses more threads than the good quality (i.e: the pipeline for high quality have more parallel stages than the good quality, so more thread).

Thank you in advance.