The bearings are now stainless and the rear axle is increased in size so you only need to swap end caps for different standards.

There are some other little changes but they're the fundamental ones

Hopefully I won't snap three 135 x 12 of them next year once I've changed mine over.

The body is the same - axles, freehub body and bearings a different... thats what the bloke from Hope told me on the phone anyway.

Does anyone know if it is possible to fit the new EVO adapter kits to the old hubs?

I am guessing that I have the same problem as messiah; The MAXLE light doesn't play well with the old PRO2 so I am running a normal/heavy MAXLE.
It would be handy if the new adapters for 12x135 would suit the MAXLE light.

Details of changes and how to upgrade are all here:
http://www.justridingalong.com/news/2011/03/hope-pro-2-evo-whats-new/

Evo-stick ?

IGMC............