Earned value is the Actual Amount of Work Accomplished whereas Variance Analysis is the Difference beween the Amount of Work Planned and the Work actually accomplished.  Variance Analysis is applicable(computed) to the triple constrains in the project  i.e. you have 3 Variance Analyses: For A) Scope B) Schedule C) Cost where as Earned Value is generally calculated for Cost.  That is why you see variance Analysis as an output on all 3 KAs where as You see EV Analysis as an output only in the Cost Management

Chandra