There is a difference. The mapping for both engines is different, the GZE ECU has the ability to engage en disengage the Supercharger en the GZE ECU can see the difference between vacuum and pressure to just name a few differences.
But there are people that made their own 4A-GTE...but to really let such a set-up run at peak performance, you would be better off to go with a fully programmable aftermarket system
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