taller gearing is more suited for turbo applications because that way you stay longer in the gear, and able to push more power at sustained high rpm.
To greatly exaggerate this example, let's say it takes a turbo l28et with a big turbo 2 seconds to go from 5000rpm to 7000rpm in 3rd gear with a 4.11 differential. That means that maximum power output is generated for 2 seconds in that gear, until you shift to 4th, and drop down to lower rpm.
swap gears to a 3.54, and that time between 5k and 7k rpm in 3rd grows to 3 seconds. maximum power output is sustained for 3seconds before the next shift
downside of taller gears on turbo cars is crappier launch (more bog)
did that make sense at all?