They have similar operating costs. From memory CCP's cash cost is about $1.50/lb and Roseby's is $1.33.
Not significantly different. Roseby's capex is going to be higher because it's going to be a larger mine and it's going to need its own infrastructure while CCP can share some of Ernest Henry's (particularly now that they're owned by the same company).
Realistically I think there's probably not much between the two of them, so they probably have pretty similar value. Maybe Roseby a bit more.
AOH Price at posting:
35.0¢ Sentiment: Buy Disclosure: Held