If Audi S5 is 6 speed manual & the GT-R is auto... i think thread starter go for auto better... I have no intention of saying thread starter cannot drives well but auto very much easier in everyday situation.
s5 is tiptronic.
they had brought in manual before but couldnt sell well.
i love manual cars.especially doing heel/toe.
but i dont mind paddle shifts too because that's what i have been driving with for the past 2 years.
in any case, most of the time, it's on auto mode for daily commuting, save for the occasional overtaking and rush to adrenaline.