Bara Gold only capable of grunting in its monster form.
Midas Monster was fully capable of talking in its monster form.
Bara Gold created gold objects by feeding off greed of humans who controlled it.
Midas Monster created gold objects without any motivation other than its own power.
Acha posed as a salesman to sell Bara Gold in its Beckoning Dog form. Everyone who saw the demonstration of its power fought over it.
Klank planted the Midas Hound in a yard sale where it was found by Bulk and Skull, who were the only ones that took advantage of its powers before its rampage.
Bara Gold grew a little each time the more it turned objects around into gold.
Midas Monster grew to giant size instantly by Orbus.
Bara Gold partially turned Shouhei Yokkaichi into gold, who remained motionless until its gold beam receivers were destroyed by Red Puncher.
Midas Monster completely turned Jason Lee Scott into gold, who was saved by the Zeo Rangers. Everything else was returned to normal when his goldenizer was destroyed.