A lot of the underlying machinery is similar: they both rely on "structure from motion" (sfm) techniques to automatically estimate both camera locations and 3d geometry of the scene simultaneously. And both works come from the same lab: the GRAIL group at the University of Washington.

(I postdoced in that lab for 3 years and the authors of this paper are friends/former colleagues.)

Was thinking that back than when Microsoft could have acquired Yahoo, that this would eventually lead to a quite comprehensive 4-dimensional point cloud of everything ever photographed.