I actually went to a clinic for Soloman Color (I think?) this winter that dealt with overlays. They seemed to focus on the "Cool Deck" & stencil type stuff mostly, not much about stamping. The look of the first 2 mentioned really turned me off. If they had shown some samples like what you posted, they probably would have had me hook, line, & sinker!
I do both conc. & masonry work, & the mason in me has a hard time accepting "mimiced" brick & stone. That's why I generally stick to non-patterned, seamless stone texture stamps, where the jointing pattern is unlimited, plus it's much easier IMO! I've allows had reservations on installing any product that would try to mimic a product that we see naturally (and locally) as it's very easy for me to spot the fake, whether it be cultured stone or concrete. We don't see any natural stone in large, flat squares as shown, so that also makes it a good choice. We do see plenty of natural flagstone, clay pavers, limestone veneer, etc..., so they are tougher to pull off in my region. Either way, now that I know your not just a "poser", I may have some tech questions for you!