Deep Wells: These wells are as deep as 70 to 300 meters and tap more than one aquifer. Such wells may yield as high as 200 to 225 litres/sec. The general average yield from the standard tube wells is about 40 to 45 litres/sec. 
Shallow Wells: These wells have a depth of about 20 to 70 meters and tap only one aquifer. Such wells may yield as high as 15 to 20 litres/sec. 
∴ Deep wells have greater yields (discharge) as compared to the shallow wells. 
Note:
Although most of the time, the deeper well has deeper depth, but sometimes a well with high discharge and lesser depth is classified as deep well. So deep well is always deeper than a shallow well may not hold true always.