okay, i said i wasn't going to get into the different established forms, but here's how they are used in the star wars universe, if the weapon is the same, there would probably be little difference in their use here (save of course the force applications and deflecting of laser bolt attacks....)
http://starwars.wikia.com/wiki/lightsaber_combat
for the record, obi wan used form iii (soresu), which was designed to be highly defensive, anakin studied form iv (ataru), focusing on power and strength, count dooku utilised form ii (makashi), a very old system, as well as a specially designed lightsaber with a curved handle to give greater finesse against other lightsabers, mace windu was a master of form vii (vaapad), which brings is highly aggressive, and yoda is a master of all 7. If you want to see examples, that is....
In terms of what you are describing l_uky3, think most of form ii (count dooku).