Drivability is the big issue as far as I'm concerned.
The cost is the big "con".

A well set up car with a carb or two that actually RUNS WELL would be the best comparison, but many guys who have drivability problems with poor running carb setups will let their enthusiasm wane towards their car because they don't enjoy it like they should.

IMO anyways...

Top end all out power will be very close, maybe some low and midrange torque numbers would lean towards the EFI.

Cold start drivability between the two would be noticeable too IMO.