Are you saying that there is no sound quality difference between Nuclesu and Nucleus+?
(The blog I that mentioned was based on the blogger’s actual exeprience and he said that he experienced more air and ambient in sound from i7 NUC. But he dosen’t know the reason for sure. He only presumes that i7 NUC seems to use different/better mainboard/parts compared to i3 NUC except for the CPU(of course))