The Penske will be way better and having it set up for that bike with the correct spring is as easy as sending it a suspension tuner. If it's been sitting for a while you should have it serviced anyway. There are lots of guys who can work on it but give Steve Breckenridge from Fluidology a call. He can also tune the other shock if you decided to do that, but to me the Penske is a no-brainer.
904-881-0512
fluidology@comcast.net