Crank set differences

Can someone please tell me if there is any difference between an S-Works set of cranks and just the ‘stock’ set of Specialized Fact Carbon cranks?
I’m looking at a new Quarq PM and most say compatible with S-Works but not necessarily the lower models… Which is what I have. Thanks… I might be thinking about it too much :thinking:

I don’t think you’re overthinking it. Matter of fact I’d contact them direct. Until then check this out in case you have not seen it: