I can't say that you will gain 15.463 horsepower. You might gain 16.752 or 13.259. Hard to feel a massive horsepower gain unless it's a boosted application, although the increase in midrange torque is noticeable in day to day driving. Our tuned cars even sound better because of the vanos changes
Regardless, the power and torque gain is an added benefit, not the #1 purpose we designed the tune for.
Any competent tuner can desensitize knock detection and perform other tricks to make 'dyno queens'. We prefer to err on the side of safety and reliabily extract what's 'safe' without pushing limits. We do not alter any factory safeguards in our performance software.
People focus on WOT and numbers when they should focus on feel, reliability, torque under the curve, and part throttle which is where you spend most of your time. Tune tune accounts for all of this and the actual gains are icing on the cake.
There is a dyno of my car here:
Happy new year!