At one point we towed with a Land Cruiser and Trailblazer EXT using an Equalizer 4 point hitch. The Land Cruiser was lifted with big tires so it needed a different height than the Trailblazer.
Anyway the Trailblazer was the main tow rig but when we were taking the Cruiser I would just break the hitch head down and raise the height to what the cruiser needed. They both used the same number of washers.
If resetting the hitch each time you switch vehicles isnt an option than buying a new head and having dedicated heads for each vehicle is the only option.
FWIW on our new travel trailer in anticipation of having 2 TVs in the near future we switched to a Blue Ox. I can have the height changed in less than 10mins when needed.