Better as in what exactly?
Better Offensively? Ghost, Petts isnt really nor never will be an offensive player, he'll chip in the odd goal/point here and there but that'll be about it.
Better as in all around? Pettersson, While he's been sporadic for good stretches which for a guy that just turned 24 in just his 2nd full season. Pettersson thinks and knows his role to be a strictly defensive minded player first but join the rush as needed or if he sees a lane.