I phoned round a few places and the codes are obviously different for both the Seat and Audi suspension, such as "SExxxxx" and "Auxxxx" so that determines very little. Visited Audi and Seat and they were both good enough to print out the exploaded view of the standard suspension in both cars, from the Etka system. Can't determine much from the diagrams either, so will just have to try and fit the suspension, which isn't an ideal way of finding out!