yj, I hate to break it to you, but you're gonna have to change your signature.
Gear ratios are written as input:output
. If the output is 1, then the 1 isn't written. So, 4.11:1 is the same thing as 4.11. That means that for every 4.11 revolutions of the drive shaft, the wheels will turn once. 3.07 means that for every 3.07 revolutions of the drive shaft, the wheels will turn once.
Lower gears are numerically higher. So, 4.11 is lower than 3.07.
A lower gear ratio will make your RPMs increase faster. This means that you will get into your engines power band quicker. Also, lower gears will transfer more of that power to the wheels. Lower gears will help you crawl over things easier but you lose some top end speed and some overall fuel economy(because the engine has to work harder to maintain the same speed).