Little to no perceptible difference at that aperture would be my guess. Are you printing very large? I'd say maybe beyond 12x18 you may be able to tell but it's still likely going to be slight at best.
I doubt that there is much difference at F/9, and by F/16, they are all nearly identical.
Don't spend a ton of money on a wide aperture lens if you are using it only at small apertures.