I think the key difference is whether the local teams have the choice to opt out or not, and my belief is that they should. If they can, they can solve their own problem if the global solution doesn't work. If the global solution wants to keep them as consumers, they must adapt. If they can't leave, the global team will almost certainly stop responding to their needs over time. Like communism, a global solution is terrific in theory, but human behavior causes it to break down in practice.

Caveat, for small enough problems, good enough solutions, and charismatic enough leaders, global solutions can work. But they all break eventually.