There's two factors at play. The variance and the ER. Assuming an equal ER then, in general, the higher the variance the better the chance of winning a session. However, comparing a 99.5% return game like JOB with a low return, high variance game you might actually do better with JOB.
For example, I just compared BP with Aces and Eights. They are almost identical variance but A/8 pays around 99.8% instead of 99.2%. That difference raises the session win percentage from 30->35%.
Also, there are extremes for variance that will change things. For example, a game that only pays on a RF would have an extremely high variance even though it could return 100%. However, since a RF only strategy yields a RF only 1 in around 24K hands you would only win 1 out of 6 sessions at most (4000 hand sessions).
What I'm giving you is basically a rule of thumb that applies to most VP games.