So the service at the HUB is OK. Lets look at the devices.
The tablet sounds like it is connected on the 2.4Ghz band an 802.11n connection would give results up to about 50Mb/s.
The PC at 92 Mb/s down, if that PC has a 1Gb/s network adaptor the link appears to have de-rated to 100Mb/s this is normally due to a cable that is out of spec or has internal damage. A new CAT6A cable will fix this - assuming the PC does have the 1Gb/s network adapter.
The PCs connection speed can be checked in the Hub menu >> Connected devices and also by looking at the Status of the PC network adaptor.