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This is not exactly correct,
The identifying characteristic in hones that give them their unique personality is the type, shape and size of abrasive imbedded in the hone. The size, geometry,...

The main difference (aside from the obvious economics=supply V. demand) is the way the two hones cut.
The nortons are a man made abrasive (probably a variation on Alu. Ox.) that has it's own...