As a Yankees fan, I wouldn't mind seeing either make it, but as stated above, I think CC has a much stronger case. That said, there was a few years in the latter part of his career, CC was pretty ineffective and almost painful to watch. He improved again in 2016 through 2018 but those few years before that were absolutely brutal.
As a final point, Pettite would never have a bobblehead as glorious as this.
