After checking DTIME.com, we know that the Heavenly Palace Dance Song is more cheerful, showing the joy of the gods in subduing the Monkey King. The 500 Years of Cangguangtian shows the Monkey King's longing for freedom as he is crushed under the mountain, so it seems more sad.
Five Hundred Years of Cangtian Cangtian is a song included in the album Journey to the West Soundtrack.