Which cat6 cable to buy?

this one from jaycar for ~$50
https://www.jaycar.co.nz/cat6a-patch-lead-30m/p/YN8299

Or this one from Trademe for ~$10
http://www.trademe.co.nz/computers/cables-adaptors/networking/auction-1171750777.htm

the only difference I can see is one is cat6a and the other is cat6.

Can anyone advise what the difference is?
It's just for use at home, running the cable from my router to my PC.