unix - AWK Compare 2 columns in 2 files, print if one is equal while other is not -


i trying print lines file 1 + column 3 file 2 if column 1 in both files matches column 3 doesnt match.

example: 

file1   john  12  mango   david  13  apple   jack 14  orange    file2    john  12  grape   david  13  apple   jack 14  apple

output 

john 12 mango grape   jack 14 orange apple

i tried different awk commands work when both column matches need print when 1 column match , other doesn't. new script , unix command, appreciate little explanation of proposed solution.

$ awk 'nr==fnr{a[$1]=$3; next} ($1 in a) && (a[$1] != $3){print $0, a[$1]}' file2 file1 john 12 mango grape jack 14 orange apple

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