Atlanta vs. Detroit - Portman's Glass Hotels

In my second installment of building vs. building threads, vote for which of the Portman-built luxury hotels is better than the other. Reasons for comparisons: these are both glass buildings built in the mid 70s, raising the standard for postmodern buildings for years to come, there both luxury hotels (though I had no idea Marriott RenCen used to also be a Westin Hotel), they have glass elevators and they have logos on top (GM HQ). Westin Peachtree Plaza Hotel, Atlanta Marriott Renaissance Center Hotel, Detroit >