most probably wala, because you're using the same gear ratios through the same torque converter. ang advantage lang ng "sequential manual shifting" na ganyan ay kung hindi pinapaabot ng redline yung transmission in a lower gear (this means that the A/T is poorly designed). but generally, kung i-floor mo yung accelerator, dapat sa redline na din maguupshift yung A/T, which is the same as manually redlining it in D2 and then manually upshifting to third gear. depends on how smart the A/T is though