Separate miners usually have more GPU cards than normal gaming PCs, up to 16 cards. Some coins are not designed for GPU mining, so the performance increase is not as big as with having better CPU.
I started explaining things because a lot of people who started before me, were explaining things incorrectly or inaccurately... I've been around long enough to witness creating new words, initialisms and abbreviations... Nowadays a lot of people just read non-sense from Wikipedia and other wikis and think that everything is always truth and accurate.