Maloney's a great runner, he never stops and he can kick goals, but Roberts has a better general kicking game and better defence. I reckon, anyway.
And the way we're going to use Roberts (second fiddle) means he'll be allowed to chance his hand and make mistakes.
I agree with this but short of arguing I think they would both fit in pretty well and play a Hornby type role (more subdued halves partner). They both have their advantages and if Roberts does well next year then getting someone like Mahoney may be redundant. If Mortz can be offloaded that money may be better spent in other department.
Next year though we may loss Shak, Poore (if he stays on it will have to be for a lot less) and Mortimer which would free up a fair bit of cash without heavily effecting the make up of the team (although that may effect depth). In this case we may be better off targeting a top notch hooker or wide running backrower if players like OHanlan, Horo or Lasalo don't develop.