I'd trust Awesome over eBay. Apparently there are fake plugs on eBay, never experienced that myself but that's what I've heard.
There are indeed. There's a youtube video showing you what to look for on NGK packets to determine fake ones.
You certainly don't want electrodes dropping off at 6000rpm and destroying the turbo's turbine wheel...and exhaust valve potentially. Been there, done that.
This is why you will constantly see Preacher Pudding trying to convert his disciples to genuine parts only.