Backroll or Tantrum - Which = Easier First Flip

Which flip is easiest to learn as a first flip, the tantrum or the backroll? Or neither and theres an easier one maybe? Also, I can HS FS 360 pretty consistently (one wake) and i can do any kind of 180 (bs hs fs ts etc) w2w consistently as well as grabs and such - is it time for me to start working on inverts or what? Which should I try and learn first? I can get upside down with the tantrum but I'm kinda scared to cut real hard and hit it goin fast. . .