@username2 -
RE: You know, that's a good question. Cost reduction in materials?
I'm not a metallurgist, but you'd have a hard time convincing me that those Challenger sockets I sold were one iota less in quality (in respect to metal alloys used) than the equivalent Proto. (And I've had several sets of Proto in my hands.)
RE: Simply a different distribution channel?
That's part of it - same reason that Thorsen sold "Action" - same reason that Duro Metal Products Co. sold both Duro-Chrome and Indestro - same reason New Britain sold Sparta, Husky, Mustang, and others.
RE: Fewer steps in manufacturing?
No... same process used for making sockets: cut from bar stock, broach, finish, plate and polish.
RE: Earlier generation?
Only if you go back to pre-1964 days, prior to Challenger having been taken out of the Fleet-Penens-Pendleton empire.
But the older (Pendleton) Challenger was good stuff - my "go to" slip-joints are a pair of old Challengers. My favorite screwdriver was a Challenger until I discovered Vessel.
RE: Overseas manufacture (is there non-USA Challenger?)
No - all made domestically in country.
Proto's venture into Mexico - which turned into "Urrea" turned out to be something of a fiasco.
RE: Outsource to different company?
Stanley had so many manufacturing facilities they didn't really need to "outsource" from anyone.
RE: No difference at all?
Other than the brand name stamped on the sockets, I would have a hard time distinguishing a late-production "Challenger" socket from the equivalent Proto.
RE: Does Challenger exist anymore?
No. Stanley Black & Decker let the brand die. It's gone the way of Oldsmobile and so many others.