So far, the socio-sexual interpretation of the Republican nomination contest remains a reliable predictive model. We've seen the Gamma candidate underperform, wilt under the pressure of Alpha contempt, and disappear from the race. We've seen the Delta, Christie, submit to the Alpha. Now the Beta (assuming the Lambda rumors are untrue) Rubio is on the verge of being chased from the race.
Ted Cruz may be more of a Sigma than I'd thought. His ruthlessness is more indicative of Sigma than Beta, as is the public perception of his weirdness and his increasingly obvious iconoclasm.
So, who wins between Sigma and Alpha? It depends. If the contest comes down to general popularity and enthusiasm, the Alpha will win. If it goes down to game-playing, intrigue, and thinking outside the box, the Sigma will win.