Here we have Olympia Express at Winter Park with the "compact" version:

To compare, this is the Rocky Mountain SuperChair at Breckenridge with the same terminal model, just a longer version:

It seems that the latter is more prevalent, as I have only seen the shorter version at Winter Park, but are there any other areas that operate the short version? Also what is the reason of having the two styles and what are the advantages and disadvantages of each?