The Arca uses a single front mount mechanism that tilts all lenses and is built into the camera body. Alpa and Cambo system require it on each lens mount ($$$$). The Cambo also has far more play in the mechanism than I'd like, but that's me.
Robert
There are positive and negative aspects of each implementation of technical camera tilt/swing for each manufacturer. And we sell all of the technical camera solutions - Alpa, Arca, Cambo, etc. Below are some additional details/corrections.
* ARCA TS
Positives are that the tilt/swing mechanism is built into the body, saving some cost and adding some convenience. Maximum tilt or swing is 5º.
Negatives are that it is limited to 5º. It cannot be combined with swing. Adapting to swing requires you to remove the entire lens assembly from the body and rotate 90º.
* CAMBO TS
Positives are that the tilt and the swing movement can be accomplished in a single capture. The knobs are isolated from the body, so less risk of pushing the camera out of registration. Maximum tilt or swing is 5º.
Negatives are that it does indeed add that cost to each lens.
* ALPA TS
Positives are that the tilt and swing movement can be accomplished in a single capture (with some lenses, and requires stacked adapters). The tilt or swing can also be moved to the rear of the camera. For some lenses, (2) tilt adapters can be stacked for an additional total of 12º tilt or swing.
Negatives are that if stacking tilt and swing to be in the same capture, they will not be on the same axis point. There is added cost, but not per lens, as was stated above, one TS adapter will work with any lens that is mounted (in SB mount).
Steve Hendrix/CI