How does an Offensive Lineman stance differ from a Defensive Linemen stance?

OFFENSIVE LINE MEN ARE OFFTEN IN A THREE POINT STANCE WITH THERE FEET SLIGHTLY STAGERED.DEFENSIVE LINEMENS STANCE CAN ETHIER BE 4 POINT STANCE WHERE BOTH HANDS ARE DOWN (USUALY IN GOALINE SITUATIONS TO GET LOWER THEN THE OFFENSIVE LINEMEN) OR THEY USE A SLIGHTLY MORE AGREESIVE 3 POINT STANCE.