difference between BitLocker Drive Encryption and Encrypting File System?

BitLocker encrypts all personal and system files on the operating system drive, fixed data drives, and removable data drives.

EFS encrypts personal files and folders one-by-one and doesn't encrypt the entire contents of a drive

BitLocker uses the Trusted Platform Module (TPM), a special microchip in many computers that supports advanced security features to encrypt the operating system drive.

EFS does not require or use any special hardware

Bitlockerencrypts  all personal and system files.