Thrall cars have a different side sheet construction, have four rungs (no drop grab mounted on lower chord) on the side ladders vs the three rungs and a drop grab mounted on the lower chord for the others. The sill step is similar to the curved NACC version, but has another step added
Trinity cars have another differing side sheet construction, the end cages that are wider so the side ladders are set off of the car and the upper metal chord on the top of the carbody is bent outwards to meet the wider cage, the roofwalk sticks out further as well. The sill step is a one step straight down affair
Other than slightly varying carbody dimensions for differing capacities (5165cf for NACC, 5150cf for Thrall, 5125cf for Trinity), all have the same basic outside dimensions
