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You can be more aggressive with the tune when you're only running direct injection as it's fundamentally more detonation resistant. My read is that the combination of the intake and the cams have been designed to give a big hump in torque low down for daily driving and a hump up top for when you're driving hard. This leaves a hole in the middle which they have been really aggressive in the tune in an attempt to minimise as much as possible.
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