If your asking what you get with the upgrade, it depends on the hotel
yes -- i realized that he was talking about the actual reservation and I was questioning the type of suite.
I've found that Hyatt House has more of those "2 bedroom"/King suites available - even just free as a Diamond, not using a DSU.
However, the fancier Regencies do not have those even for a $600 room. It's up to the type of hotel chain...