a lot of grannie stuff is like sierra is like escort if you know what i mean, you can tell somebody had their hand in across the board.
differances between Walter Wolf and Andy Rouse are not that much really, they both prepared Fords for FORD, Wolf owned a Ford dealership too,and tuned Fords from about the late 70's. Wolf prepared/raced RS500's in the DTM which imo was a superior race series to the BTCC.aswell as their being loads of tuning parts that were official ford and available from your German Ford dealer
Wolf still prepare and race Fords for Ford Germany although its Uwe not Walter .
i know of 2 Wolf race cars that turned up in Stockport Cheshire,1 a Sierra and the other a Escort Cosworth