As the title states, has anyone gained any factual track numbers from changing from any other platforms (HP Tuners, MS3, BS3, Fuel Tech, Fast etc) to Holley?

I have a turbo LT1 car (yea I know) and would like to upgrade to a more efficient efi but the price point is making it difficult. No I havent maxed out my HP Tuners yet. But I'd like to go to a more radical setup in the next couple years and would like to have the efi portion already taken care of. Im not a dyno numbers type of guy but if you have any for comparison, that'd be great!