In my experience with Red cassettes, they are a bit louder, but I didn't find it annoying. If you don't like a cassette that makes that much noise, use a Dura Ace cassette and chain or even Ultegra cassette and chain.
I have a Red Cassette, it makes noise, but its not like a wtf noise. Also make bit of a different noise when you shift, may be in part ot the cassette being hollow. I think it shifts better than the 1070. But my setup I got a good mix of products, with DA rear derailer, Cannondale Mark V chain rings and 1090R chain.
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