How to compare cell data in excel. (advance)

Hi all
I want to compare data of a 2 column but I want to know the what data exactly not matching.

I know the function "Exact" but its just giving whether the two cells are having same data or not.

I want to know which character causing mismatch.
Eg. A1 cell has data : I love excel forum
B1 cell has data : I lov excel forum
So when i compare A1 and B1 then I want excel should pop up that "e" is missing so causing mismatch in both cells.

Please treat this as high priority. Thanks in advance .

You can try using UDF like this:

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Wow.
Thank you Wormsek. It really nice.

Thank you very much.