The E has MFI v. my Zeniths, but I don't have any framework to compare those 2 systems.
I would think the MFI should be better than carbs as there are less restrictions (no venturi). I built a couple small engines with both MFI and Zeniths recently, here are the dyno results at the wheels. Larger ports did not hurt power or torque in my case.
https://forums.pelicanparts.com/porsche-911-technical-forum/1151593-dyno-summary-testing-early-2-4l-2-5l.html
John