I grew up with the Lion force Voltron so Im a bit impartial on that one. They did show the Vehicle Force after they finished a season of Lion force , I only saw a handful of episodes as it didnt appeal to me... I prefered Voltes V if it was vehicles into big killer robot, Lion force sorta appealed coz they got more interesting enemies and plus the MOnster robots created by Hagar were more interesting as they do look like technoorganicmonsters robots... vehicle force enemy robots well they're just robots..... Also there's a whole heap of casts in the vehicle force that I never ever remembered any of them at all.... Dubbing wise well Mr Cullen's OP voice doesnt really match the Commander's "look" in vehicle force IMO....voice sounds old like 50s dignified veteran well the drawing doesnt lookit..... Also Ive seen the 2 voltrons movie special where they combined forces to defeat whose enemy - LION FORCE so Im guessing the producers do recognise that the Lion force is the more popular/interesting series so they ended up with more focus on the lion force characters and story plot ( long story short - Keith ends up with Princess Allura and Hagar turns good - 2 Voltrons help invade and destroy Planet Doom).