Witch is better? GARMIN Forerunner 245 Music or GARMIN Forerunner 645 Music?

Witch is better?
GARMIN Forerunner 245 Music
or
GARMIN Forerunner 645 Music

and they say they can Synchronize with KKBOX or Spotify® music streaming service.But if i use apple music,can i also Streaming media to download music simultaneously???