bash compare two columns with exact match - awk

Question

I am comparing columns between two files for exact match but I am ending up with inaccurate result. Example as follows.
File1 File2
adam sunny
jhon adam
kelly adam
matt kevin
stuart adam
Gary Gary
When we look at the files there is only match i.e. Garry. My output should be following.
Emptyline
Emptyline
Emptyline
Emptyline
Emptyline
Gary
In order to achieve requirement. I am running the following command
awk 'NR==FNR { n[$1]=$0;next } ($1 in n) { print n[$1],$2 }' file1 file2
and I am getting output as follows
adam
adam
adam
Garry

Answer 1

You should be tracking line numbers, not just line contents:
$ awk 'NR==FNR { lines[NR]=$0; next }
{ if ($0 == lines[FNR]) print; else print "" }' file1.txt file2.txt
Gary

Answer 2

1st solution: With simple awk.
awk 'FNR==NR{a[FNR]=$0;next} a[FNR]==$0{print;next} {print ""}' file1 file2
OR as per anubhava sir's comment:
awk 'FNR==NR{a[FNR]=$0;next} a[FNR]!=$0{$0=""} 1' file1 file2
Explanation: Adding detailed explanation for above code.
awk ' ##Starting awk program from here.
FNR==NR{ ##Checking condition FNR==NR which will be TRUE when first file Input_file1 is being read.
a[FNR]=$0 ##Creating an array a with index FNR and value of current line here.
next ##next will skip all further statements from here.
}
a[FNR]==$0{ ##Checking condition if value of array a with FNR index and current line is equal then do following.
print $0,a[FNR] ##Printing current line and value array a with index FNR here.
}
' file1 file2 ##Mentioning Input_file names here
2nd solution: Considering that your actual Input_file(s) have only 2 columns as per shown samples, could you please try following then.
paste Input_file1 Input_file2 | awk '$1==$2{print $1};$1!=$2{print ""}'
This code will only print lines whose values are equal in Input_file1 and Input_file2.