310bhp or thereabouts
Take a look at the various r/r days that have been done. Several Ed30's and Cupras with APR code, full exhausts and uprated intakes barely make it over 300bhp when a car with a GIAC/Revo map alone make very slightly more. Also, Revo cars with full exhausts are making 320bhp. Add a decent intake to get closer 330bhp on the same r/r same day as the Stage 2 APR cars.
APR outputs are very smooth and progressive, but they are obviously designed with component longevity in mind as cars with a revo/giac remap alone produce higher peak bhp and ft-lb figures than an APR car with full exhaust and pump/intake upgrade. Naturally the APR car would be far better to drive across the rev range than a car with a remap alone, but with the same modifications, Revo and GIAC cars make higher numbers and also have fairly nice power and torque curves.
Power is nothing without control though, and no doubt a standard
Cupra with a diff would keep with a APR/Revo/GIAC car with no diff round a track down to ability to deliver power and not waste it through wheelspin or poor grip/traction.