pysftp vs. Paramiko

I have a simple requirement to drop a file on an SFTP server. I have found pysftp and Paramiko libraries that seem to allow me to this and developed a simple application using Paramiko but I can’t find a proper source that compares the two so I can decide which one I can/should use. What are the pros and cons for each?

Paramiko’s SSHClient with SFTP

How I can make SFTP transport through SSHClient on the remote server? I have a local host and two remote hosts. Remote hosts are backup server and web server. I need to find on backup server necessary backup file and put it on web server over SFTP. How can I make Paramiko’s SFTP transport work with Paramiko’s SSHClient?