Dunno about this eh, but I have heard a SC12 will actually blast out more air because if it's higher redline.
Either way they both tend to shit things up the fuck once they crank over 12psi poost - overheat and stz
Maths
SC12, 1.2L per Rev x 14,000RPM = 16,800L per Min of air
SC14 however can do 14,000L per min at 10,000RPM
Whether this math actually translates into a real world advantage, I dunno.