I don't think there is much difference in the recovery. For that matter, there isn't that much difference with CABG to valve surgery in terms of recovery if they are the same split sternum, open chest.
The difference is individual to individual. We all heal differenty and at different pace. I healed differently one OHS to the second. Same surgeon, same hospital. Same open chest, split sternum four years apart. My early recovery and first several months was very much easier on me the second surgery. But then I came to something of a 'wall' and my full, total recovery has stalled.