Dubious cable specs
I was under the impression 10GbE wasn't up to running on Cat6 over a full 100m span? Depending on the specifics of the particular install you may get 60m or so for isolated or shielded cables or down to around 40m for cables in crowded ducts. You need Cat6A for the full 100m.
And as for Cat7 although you see it on sale all the time it is essentially a meaningless marketing term - there is no formal spec making it somewhat akin to "350MHz" Cat5e leads.