In the same way a proper 75Ohm SPDIF cable (Meridian black) with WBT Nextgen 0110 Ag connectors affects the audioquality compared to brass RCA and copperwire. But this is in a lesser degree ofcourse.
The packets are unharmed!

But the GISO GB is the star of the show here, normally I would just have gone with an AQ Vodka (cat7) for this purpose. But there was a deal on the diamond so I took it.
I think the AQ Vodka is the best price/performance for SL/LAN of shorter lengths. On longer lengths the Meridian SL is best price/performance.
On HD621 there was a clear difference between the AQ Vodka and Diamond RJ45 though so I guess I was curious to check it after the Giso GB. The jury is out though if there is any reason to venture beyond the AQ Vodka on Sooloos LAN connections.