Moeee, you're not getting what I'm saying. You aren't meant to compare a single priced $2.00 to a multi priced at $2.00. You have to compare say two bets of $1.42, and putting them tother in a multi which would pay roughly $2.00.

Ie betting Team A at $1.42 and then team B at $1.42 gives much less variance than betting Teams A & B in a $2.00 multi.

You see variance obviously goes up when you put them in a multi instead of betting them single. This is due to needing them both to win. Now since variance has gone up, there is much greater risk of overbetting, which in turn very often leads to ruin.

The other thing to consider (although it doesn't really matter if you are just a casual bettor), is that betting singles allows you to get the best prices at different books. A multi means taking the prices offered by a single book. Shopping around for the best prices is often worth enough to counter the house edge (ie break even vs the bookie).