stage 2 9 tooth vs. 8 tooth

[Skurge420]

i have the 8 tooth stage 2 in my supra and the 9 tooth in the skyline

now the 9 tooth should have more top end than the 8 but in my case the 8 tooth is quicker off the line(it should be) but it also has more top end

both have the same setup

yellow springs in back
soft slicks
same gear in the rear end
bearings in both


any ideas?