Difference with SFTP and FTPS?
FTPS is FTP with SSL for security. It uses a control channel and opens new connections for the data transfer. Thus, it uses multiple ports. This uses SSL, and it requires an SSL certificate.
SFTP (SSH File Transfer Protocol/Secure File Transfer Protocol) was designed as an extension of SSH to provide file transfer capability, so it usually uses only the SSH port for both data and control.
Is SFTP or FTPS more secure?
No. Technically, SFTP is easier for the backup setup firewall jargon. But it has nothing to do with the end user. Most importantly the data is encrypted over a secure channel. They are however completely different protocols but achieve the same end result. Encrypted file transfers.