In reply to Ed Booth:
We went out to Kaly last year with two new ropes - a Mammut Revelation 9.2mm, and an Edelrid Anniversary 9.8mm. The Edelrid seemed slicker than the Mammut, about the same diameter (despite the official stats), and after two and a half weeks of redpointing with them seemed to be in slightly better nick (though both had plenty of life left in them). After two weeks we all preferred the Edelrid - though initially it was pretty slippy.
Henry