530t / 529t clarification needed

I am looking to add remote roll down for the tailgate window on my bronco to my ESP150.  I know either a 529t or a 530t would do it. Besides the fact that the 530t is made for two windows, what are the differences in functionality or in daily use between the two units.

I have heard of 'one touch' but am not sure how that applies.  I would like to to go down when I press the aux button on the remote.  Is there any special programming or wiring I need to do to make this happen?

Thanks in advance.

529t can control two windows in one direction or one window in both directions (but not at the same time).

530t can control TWO windows in TWO directions.

Both allow for one-touch -- basically, for your tailgate purposes, whatever you find cheaper, 529t or 530t is fine.  One touch means that the button inside the truck that rolls the tailgate window up/down can now be a "one-touch" button, in that when you hold the button (in either direction) for > 1 second, it'll roll the window all the way up or down until it reaches it's max limit (without you having to hold the button the whole time).

Both manuals (install manuals) are on this site, go to DOWNLOADS and search "529" and "530" ...