How do different Differential gear ratios affect top speed?

How do different Differential gear ratios affect top speed?
Lower differential gear ratios, such as a 4.11 for example will help you get up to speed sooner in all gears, but your top speed will be limited vs a differential gear ratio of 3.08. In other words more torque less speed, less torque more speed. 4.11 for example means that your drive shaft from the transmission to the rear end spinns 4 times for every 1 time your tire does one complete rotation. If the rear end gear ratio was 3.08 instead of 4.11, the your driveshaft would rotate 3 times for every 1 time the tire did one complete rotation. So the engine would rev less in the final gear at the same speed, but there would be less torque. The weight of your vehicle, the amount of torque and horsepower your engine puts out and the type of transmission and the amount and type of gears it has also determines alot.