The Caballo Loco Grands Crus were created by Valdivieso to show the different wines that are fundamental components of the icon Caballo Loco wine. For this reason, specific wines from specific valleys wine were born, where each strain/blend reflects the maximum expression of that valley.
One can arguably see these wines as understudies for the "true" Caballo Loco, but they are more than that, being quite superb - and full-throttle - wines in their own right, made with all the care, attention and know-how of the NV/"solera" version.
See blue link below for the fiche technique/technical note from the winemakers themselves.
Caballo Loco Grand Cru Sagrada Familia 2015 - fiche technique
This Grand Cru Sagrada Familia represents all the fruit power and smoothness of the Curico Valley (and specifically the Sagrada Famila DO within it) with a blend of (deep breath) Cabernet Sauvignon, Cabernet Franc, Malbec, Petit Verdot and Carmenere.