APR tune I put down 370 HP and 380 TQ on a Dyno in Denver. UM tuned the car the same day and it put down 420 HP and 410 TQ on the same dyno and a few hours later. It drove so much better. I have the dyno charts some where.
On a mustang dyno the car put down 330WHP with APR and it put down 370 with the UM tune. I probably put posts on it somewhere when I cared about bragging about my numbers for my car.
Maybe APR has improved their tune in the last few years and that is cool. I know their MK7 Stage 3 kit had tune issues that took them a while to figure out. UM would tune those MK7 cars and the power was a bit higher.
If you really care, go read the older posts in the MK6 R section about APR Stage 2 and versus UM Stage 2 and the cars at the track. One guy posted that the UM tuned R's would pull away from him in his APR stage 2 tuned car.