You don't need those for stage 1. OEM plugs or NGK platinum or iridium are perfectly fine. :-)
.... x 2
Also as recommended by every single reputable tuner and workshop that I have spoken to. You don't even need a colder plug for Stage 2, but it's recommended for Stage 2+ and upwards.
VW upgraded/updated their OEM plugs over a year ago.
What is recommended is to change plugs on a remapped 2.0T FSI every 20k miles.