I have some input to contribute with actual comparisons, but I'll save that for a separate response, so that those interested can easily skip over this monologue...
I think one of the big problems with threads like this, is how incredibly oversimplified the question is in the first place, of "made-in-USA Craftsman tools versus made-in-China Craftsman tools". The reality is so much more complicated than there being the 3 versions of Craftsman tools you mention (made-in-USA, mad-in-China, and SB&D made-in-wherever).
Craftsman has never been a tool manufacturer at any point in their entire history, dating back to when they were first sold in 1927; they've only ever been a tool brand that sources its tools from other manufacturers. Check out the
Craftsman Wikipedia page for more info. If you walk into a Sears today, you'd see hammers by Vaughan, pry bars by Wilde
and Mayhew, impact screwdrivers from Vessel, pliers from Knipex, levels by Johnson, and of course the majority of their stuff manufactured by Western Forge and Apex.
Most of the made-in-China shift from the last decade came from the fact that Apex, which made their wrenches, ratchets, and sockets (among other tools) began shifting their manufacturing from the USA to China. See the
"Sourcing" section of their Wikipedia page.
What's more, they have
constantly changed source manufacturers over the years, as needs change, prices change, industries change, economies change, etc. So think of how many different manufacturers Craftsman currently contracts to make its tools today, and imagine that they're changing each year. Suddenly, it makes sense how you can end up with
this many source code identifiers stamped onto the tools. Not all of those listed are for hand tools, but I've also noticed that the list isn't very up-to-date either, as several of the manufacturers making today's tools that I mentioned above aren't even on the list.
With all this in mind, even if you had started the thread asking specifically about the difference in quality of made-in-USA versus made-in-China Craftsman
sockets, you'd end up with a lot of different answers, as the manufacturers for the made-in-USA sockets has changed over the many years that Craftsman sockets have been sold, and even within a given manufacturer and COO, the designs still change over time.
It'd be nice to think that we could isolate these changes with model numbers and COO, but Craftsman is notoriously bad about reusing model numbers indefinitely, even when tools change COO or (even worse) when the tool is completely redesigned. So, what you really need to know is for a given tool, which
years are better quality, kind of like a wine. Except, unlike wine, they don't print the manufacturing date on the tools or packaging, so most people can't tell you exactly which year their tools were manufactured.
One of the other posters in this thread had the right idea, in terms of asking for which Craftsman made-in-China tools to avoid. Even then, I think it's generally hard to say. The issue with cheaper tools (regardless of where they're made), often isn't that they're worse quality overall; it's that they have worse quality control, which means you just have a greater chance of getting a bad tool. But you could still get a good one, as well. This starts to explain how the opinions can vary so much from one experience to another.