Battle Bakraid is an arcade game featuring intense, fast-paced vehicular combat. The Japanese release from April 7th, 1999, likely predates the "Unlimited Version".  This version of the game may offer core gameplay elements later seen in the "Unlimited Version", with some potential differences in features or content.  The date of release further emphasizes this game version. 

Battle Bakraid (Japan) (Wed Apr 7 1999)

Battle Bakraid - Unlimited Version (China) (Tue Jun 8 1999)