The Chip Guide still has the same photo for the downtown Hilton and the one on Sierra St (by the airport). I think the history of these places is confused on TCG as well. I tried to help, but don't have a photo of the Hilton Resort (downtown) to submit.

http://www.themogh.org/cg_chip2.php?id=NVREHI

http://www.themogh.org/cg_chip2.php?id=NVREHR

This photo appears for both casinos in Reno.