I haven't the foggiest idea what the differences in Pulman cars are. I bought my mother a 4 car set of pulman cars by MDC Roundhouse and I can't identify which one is which to save me now. I know the one with the funky yellow handrails on the back is the observation car, but there is supposed to be a Dining Car, a Sleeper Car and a Combine but I have no clue which ones are which other than the observation car. Another question I have is is there any sort of order they would go in in the train or does it really matter? Pics to follow.