I want to say that the Agent Rocker is stiffer than the Reverb Rocker but don't quote me on that. The Agent is a directional and would be a great all mountain/freestyle board. Excels in the park too. Easy to ride switch on - its techincally a directional board but only slightly - its shape is easy to ride switch with.
I think you'd have more difficulty charging on the Reverb, as its aimed more towards the park.