I am not sure if we can use both phrasal verb to mean the same thing. I am thinking of using them as "swallow" or "gulp down". Is that semantically correct?
The black hole sucked up the entire solar system.
"Suck up" is used for drinks, especially when drunk through a straw. It is also used figuratively to mean "put up with a difficult situation"
"Suck in" can be used, for example for pulling in your belly to appear slimmer. It could also be used for sucking in air for example into a jet.
Scientifically neither is a good description of a black hole, which is a gravity field, and doesn't suck anything. It would be better to say "The whole solar system fell into the black hole".