Who can tell me the difference between Buddhism and Taoism?

First of all, "Tao" has no special concept of "karma", and Laozi and Zhuangzi have not specifically mentioned it, although some contents do involve this aspect. You should be talking about Taoism.

Then, cause and effect and karma belong to Buddhism. At the beginning, the Buddha said that "the origin is empty." Later, these concepts were borrowed by Taoism.

Finally, concept, causality and causality are two different descriptions of the same thing. Everything in the world gathers and disperses and influences each other, which is the law of fate; The concrete process of influence, from one state to another, is causality.