FTP and SFTP contains a lot of difference between both of them .

FTP means File Transfer Protocol while SFTP means Secured File Transfer Protocol.
FTP uses Port 21 whereas SFTP uses Port 22.
SFTP shares its files with full security whereas FTP uploads or downloads its data without any security.
Filezilla is best for FTP whereas winSCP is regarded best for SFTP.
FTP sends data in plain text while SFTP provides a little bit of privacy.
FTP is used by anyone whereas SFTP is used by server owner because 22 port is not open in case of shared hosting.
SFTP is fully secured and satisfactory whereas FTP is less secured.