I have the smart hub 6a. Upgraded from hub 5. I had my Ps4 linked to my hub5 via a tp link powerline adaptor. Got speeds of around 35 to 40mbps. Happy days, never faultered. My ps4 is in a bedroom upstairs, router in main living room, hence why I used a powerline adaptor.
Received the hub 6a, plugged in my tp link adaptor and speeds fluctuated from 7 to 10 mbps on my ps4. On my laptop i got speeds of around 40mbps. Scratch head time. Rang support suggested I try the mini connector kit. Received today still slow speeds on ps4 but 40mps on laptop.
Don't understand why. Although the hub 6a seems to automatically assign a port forward rule for the Ps4. The port numbers are 9308. These don't seem to match the numbers suggested for the playstation network.
I did ring tech support but he was useless. Suggested I speak to Sony.