I think that they might be compared to alpina rather than to other tuners , because they put more exclusive equipment on the porshces , they're an independent car manufacturer by the german law and they sell complete cars rather than make conversions , i remember i've seen last summer in austria in a tunnel the "yellow bird" (an old ruf , you'll probably know which one i'm talking about) was giving f355 a run in tunnel , and i really have to admit that i have never heard any sweater car sounds , a ruf reving it up to the max and make a little backfire when shifting , and then this screaming V8 ferrari , unluckily i was driving the chrysler town&country full of women and children so i couldn't even try to follow'em for a while just to hear some more...
I love all rufs , but the old ones rock , jusr like all old porsches , ferraris , lambos and astons , call me a dinosaur but these cars ... i don't have words to describe ... my friend finished restoring a 27 year old aston martin with all orginal parts , it costed a lot , both money and work , but was worth every penny , damn this car drives superb , and sounds magically ... hehe