Please be aware that the EFI units used on the L series engines are analog and not digital. 
  
Also the use of an AFM instead of a MAS creates a restriction. 
  
I have yet to see an instance of a modern EFI system properly tuned NOT providing more hp, torque, driveability and gas mileage throughout the entire power range vs a carb setup. 
  
In the case of high horsepower/rpm setups operating in a narrow range a carb setup can work just as well and be simpler.