from what i know (please correct me if you disagree)
turbos in the 1jz will handle ~16psi reliably
turbo in the rb25 will handle ~12psi reliably
1jz stock bottom end will handle in excess of 300kw
rb25 stock bottom end limit is around 280-300
for very similar mods, you will extract more power from the toyota and it will be stronger, although 1jz in an auto soarer isn't particularly inspiring in my opinion. but in manual chaser format...
as much as i love nissans, you gotta respect the strength of the toyota.
having said all that, if given the choice of a soarer or a skyline, i'd take the skyline any day of the week.
continue debate