if your running a k03 make sure the mapper knows this before any figures are offered... most will assume its a k03s.
i honestly wouldnt get hung up on figures. all the maps will give you a grin factor whatever the numbers.
more importantly...
are they well respected within the VAG group?
are they knowledgable with our cars?
have you spoken to satisfied customers?
are you confident that the tuner will rectify any issues and give their support?
do they give you free coffee? (mine had to be gently kicked first
)
either way +/- 10bhp or lbsft means nothing compared to a map that sustains its power band.