What is the difference between the two? I have 2002 Acura TL and i want to be able to roll up/down or partial up/down on all four windows and the same with the sunroof also.

 

You need two 530Ts to do the front and rear windows, it will fully automate the windows for up and down and give to 1" venting, you should be able to use a 529T for the sun roof, timer relay may be needed for sun roof.

529T will do two windows up or down, or one window up and down.
530T will do two windows up and down, fully automate two windows up and down, 1" venting and window stop in either direction when either up or down is pressed. 94