Honestly, Bola del Mundo isn't that much different than Tre Cime from Cortina (if you use it without the Giau first)
Similar altitude, similar length of the final steep part and Tre Cime also goes up to 18/19%.
I kinda wish we'd see Bola del Mundo more often, they haven't used it since 2012 (when they also had Cuitu Negru, the goattrack to finish all goattracks).
Menchov won Bola followed by one Richie Porte from the break.