Taoism is about many things, but in the first line of the Tao Te Ching it states that:
The tao that can be told
is not the eternal Tao
The name that can be named
is not the eternal Name.
Thus meaning that words are not adequate to talk about a lot of stuff and so we should shut up a bit.
Buddhism has an aspect of achieving nirvana after transcending desire. And it is this unearthliness which contrasts it with the earthiness of Taoism.
Zen suggests that it is "inbetween", in the moment, though this in not absent from Taoism (or Islam, which has submission to 'God').
There is a Taoist story about Jesus, Buddha and LaoTsu taking three donkeys up a hill via three different paths, thus representing that they are leading to the same place by different paths.