GA37

I have 2 identical 1995 Atlas Copco GA37 50HP Compressors. One of them runs at ~200 deg F. fully loaded. The other runs ~225 deg F fully loaded. They are about 10 feet away from each other under the same ambient conditions. The oil and filters are changed regularly. What can cause this. They are set to shut down at 235F. The hot one goes into alarm but does not shut off (yet). What should the temp be roughly? I understand it will fluctuate with ambient temperature conditions. Thanks, Dan Miller