Right, wrong or misguided, I used my operating environment as a screening criteria for my selection of the Sedona tirres. Weight, during my decision process was not "weighted" (no pun intended) as a criteria above wear. The only major soil composition I don't contend with is sand. Also, the TDPP (Tire Decision Purchase Process) <<< I made that up / included as part of my operator maintenance schedule, a tire rotation plan. One size meets that requirement. Also, until "airless technology" catches up with my discretionary income, I'll mount a spare too.
While in my opinion, unsprung weight is a factor in design considerations, in my (our) case with the P5, the independent front and rear suspension, help mitigate unsprung weight and allow, especially in the smaller tires IE 24-26" variety, negligible ill effect.
So, at the end of the day my P5 will see utilitarian use in and around my hunting camp, 4K elevation, no sand.
Everyone on this forum will have different selection criteria. They'll weight their selection criteria differently and naturally interject their experience level, operating environment and personal preference as a factor too. There have been volumes devoted here to "Tars". With some pretty fair and unbiased opinions offered.
OK, I said all that (gotta lay of the caffeine) to say, "in my opinion for my application, operating environment and maintenace requirements, the weight from "stock-ers" to 26" Sedona's was not a consideration...