Hopefully, now you have a little more clarity and less confusion, and not more confusion and less clarity. If so, I’m sorry. I think the main difference comes down to the adjustability for me.
If you like to tinker and get that extra dialed suspension feeling, then the Rockshox Pike Ultimate with the Charger 2.1 RC2 might be the better choice as you have some more compression adjustment. The Rockshox is also a bit plusher off the top than the Fox 34.
If you are looking for simple adjustments, and also like the Firm lockout position, then the Fox 34 would be better for you. As well, if you are looking for a light 120mm only option, the Fox 34 Step-Cast takes the win. These both really come down to what you are looking for in adjustment and weight. It's hard to have it all but that is also why we have so many options since each rider likes their own flavors.