What is the difference between the application “Music player” and “Play Music”?

Difference between the application Music player and Play Music.
Music player is the application provided by Sony.

Main functions are as below:

• Play music transferred to WALKMAN
• Display and search the album and music information which is playing
• Add lyrics and Cover Art
• Analyze music contents with 12 TONE ANALYSIS
• Play music with high quality by using equalize and Clear Audio Technology

Note: Music is the application to play music provided by Android.