spider jam is also really old (spider III generation tech, released with the spider IV generation amps) and cannot use the spider edit software at all.
i do believe that the spider jam being built around a looper will use the express in jam control mode to do the same as ABCD on the full shortboard.
(NO BANK CONTROL ON EXPRESS AKA NO E BUTTON)
also no reason to worry about MKII versions of the express or shortboard as the jam will not utilize the USB...