Theres a fair jump in power going from stock to stage 1, expecially in torque on the 2.0TSI motor. You will definitely notice the difference.

As a rule of thumb, with a stage 1 tune you will end up with your stock flywheel power at the wheels. That might sound confusing, but i mean that your car has 145-150kw from the factory (at the flywheel), and a stage 1 tune will yield approx that same figure at the wheels. So you will end up with around 180kw or so at the engine.

All the 2.0TSI engines i have seen dyno readouts for are making about 150kw at the wheels with a stage 1 tune.