It seems that some HP properties were built to Amerisuite standards (blueprints) even after the acquisition. I am soon having a stay at the Reno Airport HP, so I looked at that. It’s on the list in that post. But
https://www.flyertalk.com/forum/hyat...er-thread.html
tells me that it was announced in 2006 as a HP. The acquisition was in 2005.