There is a deference and rr5 owners did used to fit later clutches but for the life of me I can not remember what they are! Been looking for you but cant find it, think the basket is different...........updated on the rr6+
Just been looking to refresh my memory but can't find much, a few say on RR.net they are the same so maybe I'm wrong but I was sure there was a small difference, maybe look at part numbers online to see, or ask the likes of Niel Spalding at sigmaperformance he will know for sure...a dam nice chap to...
the differnce is that the fingers on the 06 basket are longer and have a band around them to help stop the clutch warping/slipping under race start conditions. saying that,the clutch basket will fit,but with an 06 pack.