Compare two coulmn

Hi,

I have two columns , Column A and B.

I want to compare column A with B and highlight column B unmatched values in red. Attached is the sample document. In the attached document, Two values in the B column are not exist in column A. So I highlighted them in red.
Comparetwocolumns.xlsx
I have to compare around 1500 rows in the actual document. So the macro should run bit quicker …