Hmmm. I have a Traeger Texas 34 that is advertised as having 646 sq. in. (34" x 19") grilling area. The Memphis Elite is advertised as having 862 sq. in. Those Amazon dimensions give me 658.7 sq. in.
I would measure for you but we are currently experiencing a bomb cyclone
I would really like to find a grill with something like a 23 in. width so I can put St Louis ribs front to back and six across.
That is 4 bones a person, I don't think that is excessive with 2 sides and some bread!