From looking on Google as I've not heard of CAT6e, I thought the only difference was a grounded shield. But from the link you provided it doesn't say CAT6e anyway so I remain confused. To me, the important attributes are pure copper 0.5mm thick, twisted pair. Although one supplier I bought from supplied me with copper coated aluminium or aluminium magnesium copper alloy wires and when I complained, pointed out it wouldn't make a noticeable difference over 50cm anyway.