Sorry for the late reply. If you are looking for just a WiFi multiplexer then I would suggest buying the A024. This is cheaper than the A026 because it comes without a GPS connection. Apart from that it works exactly the same with WiFi, USB and multiplexer.
However if you want the GPS/AIS as a redundancy for your system then I would purchase the A026 and leave the connections apart from the multiplexer.
I hope this helps, please let me know if there is anything else I can help with.
Best regards