Which bankroll?
If you have 100$, play the 1$ tournaments.
If you have 500$, play the 5$ tournaments.
They are all POKER, so it really depends more on BRM than on specific Tournaments.
In 888 Poker, there are excellent tournaments for $ 1 and 2 - 3 dollars, in which you can win and raise your bankroll, but there are expensive tournaments where you can win money but you need to try hard to win, and so many good ones tournaments that cost up to 5 dollars!