Lance 855S

AF 811

Just a few of the larger differences I have observed.
We have the Lance. I have been in the AF for a prolonged tour. While it might not appear to be so, the bathroom in the AF is a better arrangement for a human body for both shower and sit down toilet use.
Having the refrigerator slide out with the dinette creates more visual and actual space in the AF. Also there are more storage drawers and cabinets to the left and right of the stove/sink. This is a huge factor in short bed/ dinette slideout campers.
The Lance does have the largest dinette/bed of all sb/ slideout campers.
The "Fox Landing" rear bumper is
really nice feature, although Lance is developing a unique version of their own.
Finally, and this is an objective factor, the AF looks like better build and finish quality.
But as Bill mentioned, look at the Eagle Cap 850 also. I would put the EC as an equal to the AF.
Good luck!
John