The price difference seems to be a couple hundred dollars.
With APR's new sales prices, it seems to come out to roughly $800.
$599 + $149 for additional software + labor.
I read somewhere on this forum that there is a UNI dealer near me that doesn't charge labor and a Stage 1 tune comes out to $550 out the door. Compared to APR who would charge $599 + labor even if I didn't purchase at sales price. I know this price comparison would vary depending on shops located around you.
REVO has a sale going on right now for 20% off of their stage 1 map. Which would bring the price down to $399+labor.
From my point of view, APR has the most expensive tune at the moment
The only reason why I even thought about going APR in the first place, was because of their previous sale of $599 for a fully loaded tune. Now that it's out the door, I will most likely be going REVO or UNI. I haven't done research on GIAC because the most reputable shops around me offer all the others.
Some may argue that it comes out to the same after you factor in UNIs or REVOs program switcher. But if you are just going Stage 1, what is the point?