Best guess is that the Legacy pump is nothing more than a rebadged Hawk pump.
After several years of owning the largest names in pressure washeing; C-Tech is beginning to consolidate productin and products.
C-Tech owns Landa, Hotsy, Rhino, Tuff, Shark, Stingray, Cuda, Hawk, Spraymart and Victor-Midland. So at some point they would have to streamline production and inventory.
As of March this year ALL C-Tech Companies will begin using Beckett burners exclusively; for example.
Hotsy machines were being built in Camas, Washington at the old Landa plant until recently when production returned to Humboldt, Iowa. Therefore C-Tech moved Tuff production to Washington alongside Rhino and the other brands.
Hotsy now has a new cold-water belt drive pressure washer that is the Landa SEA painted red. Landa has a new gas-fired unit that is the Hotsy 900 series. Tuff now sells Rhino designed units.
As you can see there is a rationalization of their products so it stands to reason the Legacy pump is a Hawk.
Hope this helps? Cheers.