Rust: What is the difference between BufReader and tokio::io::BufReader?

1// Blocking
2use std::io::BufRead;
3let file = std::fs::File::open("file.txt")?;
4let reader = std::io::BufReader::new(file);
5
6// Async
7use tokio::io::AsyncBufReadExt;
8let file = tokio::fs::File::open("file.txt").await?;
9let reader = tokio::io::BufReader::new(file);