Ring game VS MTT

[aslowjoe]

I am sure this has been covered many times before but humour me for a moment. I have played about 300,000 hands of 6 max and I am starting to get a little burned out. The ring games are very profitable but rake back and bonuses are a big help which are not available for tourney's. What about making semi consistent money playing MTT? Is the variance too big? Is your edge big enough?
I realize the loss of profit intially would be unpleasant but assume you had as much competence at both games are they close in earnings?