both isn't mechanical kb.
Mechanical keyboard, to define the microswitches keyboard, is one of the wrongest definition ever created.
Any keyboard that requires a mechanical action to register an event is a mechanical keyboard, from the first Harpsichord to the Blackberry Storm's touchscreen.
Also the microswitches definition is not a lot more precise, because just the topre and the hall effect based keyboard are excluded from this definition.
Discrete "microswitches keyboard" could be a good definition to define cherry and alps board, but model M and model F will be excluded.
So I think that the only common item is the metal spring, which is present in cherry, alps, model M and F, and also in topre boards.
Should we call metal spring boards what we currently call mechanical keyboard.