Comment by edgineer

Counter-anecdote, I did the same, got Burt's Bees with novamin when they still sold it (discontinued), then switched back to Crest. I prefer the Crest. No cavities either way, but tooth sensitivity and clean feeling differences. A tooth chip I wondered might remineralize, i.e. grow back or fill in or something, had no change.

My guess is the SLS detergent, present in Crest and not in Burt's, is the more significant factor.