IIRC, an "overlap" among Frog series didn't happen before - I can't think of two series being produced at the same time.
And I really didn't understand why Casio produced both the 8250 and 1000 at the same time to begin with, since they have basically the same module and looks. It wasn't like the 1000 was an evolution (either in looks or functions) compared to the 8250.
Could be. And if that's true, Casio is really playing the collector's market.The 8250 frogman is more for the masses and the 1000 is for the more wealthy collectors.