These cards use the same image. Most details are identical, but Britton & Rey adds the Dutch Windmill (completed 1902) and adds flags on the Pavillion flagpoles, absent in the Weidner cards. All show the Swiss Chalet (built 1900) on the west side of Ocean Boulevard (now Great Highway), opposite the later location of the Beach Chalet, and none shows the Murphy Windmill (completed 1905). I believe the original photo is by Weidner ca. 1901, predating the Dutch Windmill.
Steve's SF postcard pages: