I read up on the AT3 4S vs the XLT. They recommend the XLT for heavy towing. They're better off road and also for heavy loads. They don't last as long as the 4S's as they're a little different rubber material but the're close. Mine don't say XLT, they say M&S but that's what the XLT is.

“In a time of deceit telling the truth is a revolutionary act.”
― George Orwell

It's not over when you lose. It's over when you quit.