Question: what is the difference between xenoverse 1 and 2?
Answer: Xenoverse 1 introduces the story and gameplay, and playing it could give you a head-start in 2. As mentioned, you can have your hero from 1 get transferred to 2 as a side character (the second game looks at the CaC of the first as a hero, so he'll have a digital statue for a while AND show up in story mode).