Juan Lira on the west summit of Twin Peaks on February 21, 2010. Photo taken from the east summit.
So which summit is higher? The two are so close in height that it is nearly impossible to tell (so climb them both to credit yourself for climbing to the HP of the massif). Mt. Dickerman is directly behind it. Dickerman's height is 5760+. The west summit of Twin Peaks is 5800+. The east summit has a 5836 spot mark. The west summit doesn't rise much above Dickerman's summit, not even taking into account Earth's curvature. This would lead one to conclude that the east summit is just a bit higher.
Click
here for a view the other way (east summit from west summit).