If I recall correctly, Pascal's argument was that if the Christian God is truly the one and only god, then if you follow him, you go to heaven and have infinite pleasure. Nothing else gives you guaranteed infinite pleasure, therefore the expectation value for being a follower of the Christian God is the highest.
Nothing else? What about the other gods that will damn you for not following them? I'd say it's an even split between all religions with a positive afterlife. Better heavens and nastier hells might skew the distribution...
