it means “time difference” or "equation of time" or"爱你没时差"
i think 没差 is not a regular expression
even i am a native chinese speaker
i am first time know the words 没差
learning chinese from 周杰伦 is a bad idea
even a lot of chinese don't know what 周杰伦 is singing about^_^
It difficult to hear 周杰伦‘s every word.