They are all pretty much the same, I have two and could not name who made them. I do not think they are that expensive though, mind you I do not know what my accounts department think of my expenditures.
If you go back to one of my jobs you can have the one I left/lost. I have a Draper one that seems OK but jams quite often. I also have one that does the insulated staples can't remember the make although I think it may be Arrow. I brought a Denmans deal one haven't tried it yet. Will probably use it when I loose the Draper one.