The post you found still pretty well summarizes my take. Although I have been shooting the pair of X5s more consistently now for a while. I might tweak my answer to appreciating the 5" gun a bit more these days. They're probably my favorite pure shooters. But it's hair splitting. And I still carry a standard 226R for work and daily use.
Re warranty stuff, my info is a bit dated, but it is my understanding that the answer is no. Separate manufacturer, all together, hence the exorbitant costs. However there have been some rumors that some of the "custom shop" guns may start getting built in NH. But I've personally not seen any actual evidence to support it, other than perhaps the American version of the P210.