EFI -VS- TBI which one-good-best-better?

I have been looking at fuel injection. I was wondering if anyone has done the DIY on either Edelbrock EFI with the tablet I think it is PN-35900? I have not seen as many for the Holley system, and it seems like it's just a couple sprayer nozzles that would spray down the dual plane Edelbrock intake already on the vehicle. Seems that would be more for economy than any performance.
And I have a brand new never opened Holley 650 cfm spread bore that was the fix for the Edelbrock it has on it now. Thats where it stands, EFI, TBI, or revert the carb to the Holley...
Performance over price any day, but not going to a shop for this one, anything over the stuff they have on their sites-real world applications I'd like to hear about how they went.
Thanks