Exactly. The only difference is the use of the Cunningham, which is an ingenious development to modify the shape of the sail on the fly but it creates a point load within the sail.

The sliding gooseneck has the same effect, but it spreads the load into the tabling rather than from a single point. All other points being equal, the gooseneck will result in slightly better shape and considerably less distorting loads within the sail.

As for jacklines, can you explain why they would be required for a sliding gooseneck with a stop? For that matter, I removed them from my gaffer as well after adding a pair of small teak buttons in lieu of a table. There is no need for the boom to fall to the deck without halyard tension.