I have a couple of MAF'*, one has all letters/ numbers matching on the long serial number to the one on my car now but doesn't match up to the the four digits underneath the serial and the other doesn't have any matching digits but comes out of the same year supercharged car as mine. Can i use either of these in my car or will there be compatibility issues?
p.* i hope you understand what i'm saying, i read it over and it seems a little confusing??

can you give us these numbers and take pictures. Also try putting those part numbers into rock auto and seeing what comes up.

If the numbers on top of the sensor match then yes. If your AFM number is different, it'* a different sensor.