Bard vs Druid

I just bought Bard and I noticed that the damage and healing is inferior to Druid's, this might as well be because of mastery level 2 against druid level 3, but at what level does bard starts to outheal/outdamage druid? is there a comparison chart between mastery level anywhere?I am asking this since I bought Bard expecting to be more useful than Druid but it seems so far that I wasted my coins :v