most condensed way to compare two rows and highlight differences

Hi guys and girls,

I pull data from a site which produces rows with 60 cells of data.
Each time rows get pulled in, and it could be duplicates.

Now I want to compare if the row I pull in already exists - I do this via a simple countif on a unique id.
Then I compare the rows via:

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If that returns false, there's differences between the two rows.

Question I have is - how can I capture which columns are different between the two rows, without looping through them (because that would mean looping 60 cells).
Basically I want to return the column headers of the columns which differ into a string - in as little lines of code as possible

Any assistance is greatly appreciated.

Solved it differently.
I populate the 60 cells one by one from a JSON element
So instead of populating, checking if there's a match, then checking for differences -I populate as :

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That leaves only the differences and eliminates the duplicates.