I kinda thought that Gekired is lacking in technique, and Gekiyellow is lack in body, and Gekiblue is lacking in heart. That's what I got from the show anyway.
Almost.
GekiRed is good in Body but being a savage he doesn't know about the Heart.
GekiYellow has a trained Heart but because of her lack of detail she lacks Technique.
GekiBlue has great Technique but because of that he lacks stamina, Body.