Originally Posted in ESF manual
Adv. Melee vs. Adv. Melee: (When two(2) players swoop at each other both using prepunch) A stream of arrows will appear at the top of your screen, some may be random. The person with the most correct, wins and is rewarded with a special combo. Ties will reset the stream of arrows and you will begin again until someone wins.
Adv. Melee vs. Basic Melee:(When two(2) players swoop at each other, but one player is holding the secondary mouse button(right click)) Basic melee hits first then the person using Adv. Melee is allowed to prepunch up to Twelve(12) hits, he or she cannot throw or start combos.
Basic Melee vs. Basic Melee:(When two(2) players swoop at each other, both holding the secondary mouse button(right click))Both players hit each other and are knocked back.