One of the biggest differences is you will not have time to camp out like you can in woods ball, you have to be very aware of your surroundings and be able to make good decisions in split seconds.
Plus the rush totally beats woods ball! I started in the woods with a jt excellerator. then a bladed cocker, then went on to tourney with the cocker then impulse, G7, DM5, 06 speed.
As long as your marker will fire paint as quick as you pull the trigger you will be ok, but a word of warning. When you see other tourney ballers gats with all their custom bells and whistles you will want and start on long downward spiral into "GUN-WHORE-DOM". You'll love it!!