VAG cars are weird, I've had both an Audi A1 and a VW Up (short lease for work); they are basically the same car, both had a 3 cylinder, 1 liter engine, similar interiors, etc. But the A1 had the sports look package and generally a fancier feel to it. But VAG uses the same base for a lot of models and brands (VW, Audi, Skoda, SEAT); quality wise there's not much difference between them, but price wise they are, with Skoda being the 'budget' brand and Audi the premium. They also own Porsche but I don't know if they use the same base, I presume not... even though with the amount of Cayennes you see on the road here they sell Porsches at similar rates as upmarket VW / Audi cars.