Considering that both drivers will run the same way, and you have the same tranny, with the same head, ecu, in the same car with the same rims, tires, and gasoline and the only difference is you have an ls bottom VS a gsr bottom then you should produce more tq since you have a ~36cc's more displacement then assuming every condition is the same then you should take him BUT things never work out this way. Best way to explain is
GSR = 1797cc's
LS = 1834cc's
There you go with displacement.
Milan