I'm guessing that most of the "house brands" (Bodger, Benjamans Best,etc) are made in the same factory.
I've bought "house brands" and got a reasonable tool, I've also got ones where the flute isn't cut square, the tool is squarely mounted in the handle, etc.
One thing that is consistent is that only the "tip" of the tool is hardened. This is due to how these tools are heat-treated. I've tested (file on the tool) and found house brands that are only hard and inch or so up the flute.
Lack of proper heat treating is not restricted to "house brands", I've tested "name brands" that where not hard all the way up the flute. In fact the only tools I've tested that where hard all the way up the shaft are Thompson and D-Way.