There are many mum analysis blunders you can make. These types of mistakes can cause costly consequences. To avoid these kinds of mistakes, understand the difference between MAE and RMSE. MAE is the ordinary absolute range between two-points, X and Y. Every error results in MAE equal in porportion to its definite value. RMSE involves squaring differences, therefore one or two big differences will increase the RMSE more than one little difference will.