I assume you mean the difference between a kegel and a jelq . Here's is my best explanation of the two: Kegel: It is the flexing of the PC muscle. When you are urinating (peeing) and you stop the flow by "flexing that muscle", you have found the PC muscle and that is a kegel. It is simply flexing the muscle (the PC muscle). Exercising your PC muscle can lead to firmer erections and contol of orgasms. Jelq : a penis enlargement exercise. It is great for gaining girth, as well as some length . It is basically "milking" the penis from the base up to the head. Look for more info on these exercises before doing them.
A kegel is a pelvic floor muscle exercise. It is down by squeezing the pc muscle. The flex is best felt by stopping the flow of urine.
A Jelq is the basic penis enlargement technique also known as milking. In a semi erect state using a OK grip of the thumb and forefinger the blood of the penis is milked with some pressure from the base to just below the head. This movement is done in succession over a period of time for enlargement.