OK, so 50mm is equivalent to about 2.0 inches, correct? I think it's possible that some of the people replying here might be thinking of the Big Apples that are 2.35", aka "balloon tires." I haven't ridden a Big Apple below 2.35" so I don't know how big a difference there is between this and the 2.0"; however, I can tell you that the Big Apple 2.35" provides a really smooth ride for me when it's loaded for commuting OR touring AND when my rides include dirt, rocks, or roots.

Does this help at all?

PS: The Schwalbe Marathon seems to be their most popular tire for commuting.