The weirdest one is the Hearns Center.
Hilton sucks on the inside, lots of dim lighting and a feaux wood pannelling feel. Allen is the worst concourse imaginable, like a sheet rock cavern devoid of amenities. Oklahoma and Bram are the most similar, but ou has an "open" plan between concourse and arena. Sprint center is an awful venue. The one's in omaha and wichita are way better.