I don't know if anyone has done a side by side dyno of these two.
Theoretically the EFI has signifigant performance advantages over a single 4v Holley. Theoretically.
Out of the box with the generic program it will probably run better, and cleaner then the Holley.
Then the fun starts. With EFI you CAN tune the car for every 100rpm increment for three different (or more) parameters. Normal idle and normal driving, performance driving, wot driving. Then factor in various atmosphere conditions. Temperature, altitude, humidity.
So far of what I have just mentioned, that is 3 x 3 x 70 (for a 7,000 rpm engine). It is possible to finish that program within the normal lifespan of you and your children. BUT you may make 20hp more across the board, eventually! But the setup sure does look cool, AND it will help the Australian governments balance of payments on international trade!