Used both, they both work well. I like the pinnacle for the coconut scent, and I would put it in my top 5 favorites. They seemed to work about the same for me and you can't go wrong with either.
I've only used Pinnacle's and it works well and smells amazing. But for the cost there are better products out there that clean just as good/better and are cheaper. My favorite car soap is Optimums, smells great, cleans very well, and has plenty of lube so your mitt just glides across the paint.
I have used both and would recommend Wolfgang. It cleaned better (stronger). If I recall Pinnacle originally was formulated to clean carnaubas which were less durable so cleaning power was reduced. I used WG at 1 oz per 3 gallons.
This was based upon 2 years ago experience so obviously not valid if they have been reformulated