Hi Sam, firstly, there is no guarantee that the 82/37 will be released, or if it is, released as an Endless Passion. That was simply a personal observation based on the feel of the rod. I would expect that there would a few similarities between that and UG83MH although I think the 82/37 may fall somewhere in between the two Ripples in power.
I can only draw a comparison on the Ripples between the current 79MH and 79H. In that case, the 79H is noticeably more powerful and will handle a significantly heavier casting weight.
Carpenter don't necessarily have a more progressive action - this is my observation specific to the Endless Passion range.