You need to realize what variance means. Its the ability to have very large swings in chips in relation to BB and large swings in percentage busts- meaning losing as a 85% favorite. This is basic definition. What this means is
1. More players = more variance
2. Higher % differences preflop between hands = more variance.
1. Heads up has least variance
2. No Limit Texas
Holdem has the most variance
Variance is not always a bad thing, depends on your style of play...do not fear it...adjust to make it an advantage