OEM Delphi GN10235 - are all sub-models the same?




I find GN10235 replacements in many places. Some have suffixes to the part number. They also have a different six-digit alphanumeric string below them.
"GN10235-11B1 with 23T040" and "GN10235-18B1 with 23T178"
Are these all the same or should I look for one where that string matches mine?


