Both sentences convey the same meaning and are grammatically correct. However, sentence 1 has better clarity and structure because it separates the two statements into two distinct sentences, making it easier to read and understand.
Sentence 2 combines both statements into one sentence with a comma splice, which can make it harder to parse the two separate ideas. To improve the structure of sentence 2, you could use a semicolon or break it up into two separate sentences like in sentence 1.
So, sentence 1 sounds better.