Does anyone know how is the ranking is done in Hilton hotel branches. Why WA room cost a lot more compares to Curio or Conrad branches . What is special service WA offers to justify their high pricing.

I have my 9th night hotel secured with point, still need 1 more night ( 8th night) at WA but the pricing 1 night is too high and I do not want to pay it >$2000 for a 1 night stay .