Maybe they changed it because it seemed redundant to say "TOR router" (like ATM machine)... :)
Either way I don't mind, but personally I think "Tor" looks more professional, less shouty, and doesn't conflict with "top of rack" router/switch (which is a thing in datacenters). I have noticed that the Tor project is pretty protective of their brand, e.g. if you start a project including "Tor" in its name they will complain and ask you to clarify lack of affiliation.
Either way I don't mind, but personally I think "Tor" looks more professional, less shouty, and doesn't conflict with "top of rack" router/switch (which is a thing in datacenters). I have noticed that the Tor project is pretty protective of their brand, e.g. if you start a project including "Tor" in its name they will complain and ask you to clarify lack of affiliation.