Yeah. Wallace seemed to be more a segregationist of convenience - from what I remember he became a fairly reasonable guy in later years once there was no political profit in the old racism.
Trump is a racist to the core of his being and could never reform. He has no choice, it follows directly from his narcissism. If he's White, whites must be better, smarter etc. With Trump the further away from his identity you go, the less valuable a person must be, because only his attributes make a person valuable.