In this case? Well, that’s a good question. In some respects they end up being the same and I guess if Grace were a cyborg, we’d still end up assuming free will and choice and emotions, like we kind of did for Cameron in The Sarah Connor Chronicles. But that would be a huge part of Grace’s identity, are cyborgs capable of all that, do the humans accept that they do, is there a point where they evolved to have that and didn’t before? So the big difference is that none of that debate is relevant now (although I did find it super interesting in TSCC).
But everything else, cyborgs are probably way stronger and effective fighting machines but different models of cyborgs have that same disparity. Cyborgs are programmed, and crucially, can be reprogrammed, but humans can be brainwashed so, same difference. Honestly, strength and loyalty aside, it really does come back to how other people treat them. As a human, Grace is “one of them” in a way she wouldn’t be as a cyborg.