Most automakers have two or three dogs in the alternative-powertrain fight for the future of driving: electric, hybrid and hybrid plug-in. But Nissan and Toyota are totally committed to electric and hybrid, respectively. Nissan aims to be the global leader in EVs. On June 9, Nissan released the second of four promised EVs. Toyota pulled the plug on its own EV program by ending a two-year deal to build electric Toyota RAV4 crossovers with Tesla Motors Inc. Who's right?