Given the same tuner there should be no difference in results between the EcuTek reflash and Cobb Pro Tune as both have access to the area's of the ECU you need for your application. One thing I will say is that MAF scaling is 100x easier for the tuner with Pro Tuner. To give you an idea I have speant a day working on MAF scaling alone on some applications with crazy MAF and turbo setups with EcuTek, I have accomplished the same with the Pro Tuner in about an hour.
What is a GT30 -10? sounds like one of the bolt on turbo's with a Garrett center cartridge. What size wheel does it have?
If it were me on your setup used for track I would probably not bother with one of those wannabe GT30r turbo's and would indeed use something like the green which seems to perform very well.
Mike
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