No, an air impact wrench is not the same as an air ratchet. The difference is in torque(twisting capability). Air impact wrenches are designed to output higher torque than ratchets which makes an impact wrench a better tool for loosening a lug nut or bolt. Air ratchets are useful for loosening or tightening lug nuts and bolts that require low-to-medium torque. But be cautious because an impact wrench can over-torque the bolts and damage the threads or break the nut or bolt heads.