NOTE: Scroll down to see more option.
Check the box that indicates the saddle spread of your bridge. One is an American type VINTAGE 6 point with saddles spread of 56.4 mm (2-7/32") and matches the measurement in the menu.
The other looks the same but has a saddle spread of 52.4mm (2-1/16").
The saddle spread dictates the pole spread of the bridge pickup.