I did see the new TTS vs S3 pricing for your extra 10ps - very pricey. Maybe a new wave of Audi pricing corrections is on it's way? For the last 5 years (when the mk6 golf came in at 20% more than the outgoing mk5), VW prices have climbed higher than Audi, not leaving much of a gap. Maybe Audis are about to become expensive again (relative to VW)?
Sticker price may not seem hugely relevant these days, but if you add thousands to the RRP, you're still going to have to stump up around half in depreciation for.a 3 year term of ownership, absorbed in monthly PCP or rental fees.