Ok, received my switch, looks almost exactly the same (no surprise there). Firmware version 0.6 on hardware version 1.1. Part number is SL-SWTGW218AS, so my guess is the first two letters is differentiating the "selling" vendor.
Only complaint I have so far... the management interface is fixed on VLAN 1. By default, I don't use VLAN 1 for anything, and normally don't even trunk it anywhere, I only allow tagged traffic on trunks.
It's not obvious, but on the VLAN screen, even if you indicate a port should be an untagged member of a specific VLAN, you still have to go into the PVID screen and set the port VLAN there as well. This really should only be a single step, not two different steps.
Outside of that, I'm happy. NAS has 2x 2.5Gbe links into the switch on my internal VLAN, and now I'm able to bring the Xfinity 2.5Gbe link into this switch on an internet VLAN and trunk that up via the 10Gbe port.