Yeah just one opponent that both lost to however difference in quality of the opponents they have beaten is huge between the two ( Povetkin, Parker, Chisora x2, Rivas, Helenius vs Ortiz x2 , Duhaupas, Spzilka, Washington and Stiverne).
I never mentioned any triangle theorie what I alluded to is that Wilder did far better against Fury than Whyte ever did who could not even land a clean shot never mind hit him hard enough to drop him .