Actually, the EWI4000 and the Akai EWI series has been around for ages. The ION seems to be a rip off from the Akai design. The Akai EWI USB is exactly the same as their EWI series except it became USB. It's not difficult to convert the EWI from midi into usb. But you're right - ION may have used cheaper materials and Akai may have adopted that to cut cost.
So, it's a chicken and egg thing - who copies who?
But one good thing - EWI now as the EVI fingering programmed into it. Which means brass players doesn't have to re-learn fingerings. But then, few brass players will want to play a wind instrument because of embouchure.
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