Yes, access to the Concierge Floor and Lounge is important. It is a shame they are only open M-F except holidays and other exceptions. Which is exactly the reason I choose Hilton over Marriott. Free breakfast and access at (almost*) all hotels and all days of the week.
*OK, you don't get breakfast at Hilton Waldorf-Astoria properties, but I think that is the only exception.
My words. Whatfor is a lounge if it is closed half of the time?