[Solved]Why is this method any different than just comparing the traditional budget to date with the expenditures to date, or comp

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[Solved]Why is this method any different than just comparing the traditional budget to date with the expenditures to date, or comparing schedule to date to the schedule baseline?

we are introduced to earned value techniques. Why is this method any different than just comparing the traditional budget to date with the expenditures to date, or comparing schedule to date to the schedule baseline? After reviewing the EV technique and calculations, does the method have any use when monitoring a project? What drawbacks does the EV technique have that may limit its use in project management?