Non will be stronger than the next and i don't believe there's a huge amount of difference , i can't remember which is which now or the numbers but i have an R16 and an R17 ratio 90 , the truck that came from the factory with say 50hp more than the other obviously has taller diff gearing but i'm sure they could swapped without worry .
Because my 1kz probably has as much power as my 1kd now i have considered swapping the diffs , but all i will gain is increased top speed (both trucks will do 100mph anyway) and maybe , just maybe it will interfere with the fact that my originally lesser hp 1kz is far more fun to drive .