My motherboard comes with SIX SATA cables (I noticed it just now, I am doing my first build as well). This is part of things included in the price we pay when choosing better brands and models, that some people think it's squandered money .
Regardless of what the packaging says, there is no difference in SATA cables. Just by one that is long enough and has the connectors you want (some have right-angled connectors and sometimes that's good, other times it's a real PITA.