Just a clarification for @easyridemm... there is no difference now in the powerplants for the Safari and RW HP. The stock is the difference. The Safari stock is much more expensive than any of the RW stocks, so the price is a little higher.
Whether the tune is worth it or not is for you to decide. They shoot extremely well out of the box. The tune is described on the AoA site, I believe. It SHOULD yield a rifle that's as good as it can be with documentation. The 25 is very good... especially with the 33.4s.
@Spray1Mark started a thread that outlines the tuning process very well.
https://www.airgunnation.com/topic/the-daystate-programmer-lets-talk-about-properly-programming-the-redwolf/?referrer=1 . It requires a tune tool but just a methodical procedure.
Bob