One advantage to EFI: it's closer to what you want in changing the fuel curve to match your torque curve.

An FI manifold can includes shapes and volumes that will not suspend fuel droplets and would cause fuel distribution issues with a carburetor. Example: Ford 5.0, where the air from the TB reverses direction in the plenum. Sometimes this is worth some power, but it depends on the manifold design.
As long as the runner velocity is good, the plenum can be significantly larger without penalty, slowing down air motion, which allows air to better follow the vacuum signal from the cylinder on intake.