Faster usually indicates top speed in which case the Z will be faster. Quicker refers to accelleration and in that case the STi is. The gearing on the STi is really short and might see a top speed of 135 while the Z can hit 155+. However, the STi can probably do high 12's low 13's if you launch it right in the 1/4 while the Z is about a second behind.
John Yim (Houston) 91 ZTT Stage...stages are confusing. Just read the mods. :) 30 BSP, Houston Region SCCA "...Just as they're about to catch me... Twin... Turbos... Kick... In..."