Does permanent magnet air compressor really save electricity

the permanent magnet variable frequency air compressor has more power saving performance than the ordinary air compressor. I believe that many factories can choose the permanent magnet variable frequency when choosing the variable frequency air compressor. Not only can save electricity, but also in the long-term return on investment, the longer the use of the air compressor, the more can save the purchase cost of an air compressor. Assuming that the ordinary air compressor can only be used for five years, then the permanent magnet variable frequency air compressor can be used for at least eight to ten years, why the permanent magnet variable frequency air compressor can be used for so long.