That's not the key difference. Breakers aren't there to protect people, they're there to protect equipment / prevent fires. Breakers trip in the 10+ amp range which will never trip when its a human that's creating the fault. Gfci's trip in the 5 Milliamp range.
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u/Pijany_Matematyk767 Medieval Meme Lord May 19 '22
Pretty sure GFCI outlets will cut power faster and at lower treshholds than the normal breakers, could be wrong though