I buy the cheapest SRAM chain. the only difference between that and the one above is the one above is nickel plated for better corrosion protection – which I don’t need, then higher up the range you’re into the chains with hollow pins and links with cut-outs for weight saving, so again pointless – just makes the chain weaker.
So no, buy the cheap SRAM chain, it’ll be fine. Not sure about KMC, the only time I had a KMC chain I got rid as it kept on snapping, three or four times in a ride once, not sure why but I switched to SRAM and never looked back. Its a chain at the end of the day so can’t get too excited, i just buy what I had before.