Visual Comparer uses the following parameters to compare files and lines:
case sensitive - ignore case sensitive for upper and lower characters;
all spaces - ignore all space characters at comparison of lines. Space as symbols are considered white-space character in range: 0x09 - 0x0D or 0x20 (space);
leading spaces - ignore leading spaces in strings
(active only if "all spaces" flag is turn off);
changes in amount of spaces - ignore difference in amount
of spaces and compare it as one space character (active only if "all spaces"
flag is turn off);
Show differences when "F12" key is pressed - activate of symbol-by-symbol line comparison mode. If lines are not equal, Visual Comparer makes symbol-by-symbol comparison. Different symbols are displayed by default red and identical - black;
Show &whitespaces also - to show at line-by-line comparison blanks and tabulation symbols;
Note: You can fix up "show differences" mode.
Simply press to "Shift+F12".