Ratings of Bullet vs Blitz vs Rapid vs Daily

How are ratings in different types of games vary and how are they related? I'm around 600 in bullet and if I have a game that rates 1000 or 1100 in post-game review, it's as high as I ever see. However, in Rapid match I'm rated 1100 and I have had individual games rated as high as 1900 in the post-game review. It appears that very similar games are rated very differently in Bullet vs Rapid. Recently I started playing daily and it appears that players 1000-1200 are at much less competitive level than the same rating in a Rapid match. I'm still establishing rating in Daily so little hard to evaluate it fully yet. How are the ratings from different types of games compare and what's a relationship between them?