Identify Duplicates (was Delete Duplicates)

NOTE: The title of this thread is misleading. . . instead, it should be "IDENTIFY DUPLICATES". So for any confusion.

I have a spreadsheet, organized in two data arrays:
1 - Data array: A1:G1500
2 - Data array: J1:N1500

I'd like to look at row A1:G1 and see if that data exists in array J1:N1500
- If it is UNIQUE, highlight the data set in J1:N1500.
- If it is DUPLICATED, build an array of that duplicate data in R1:Wxxx

Attached is an example of the data sets and results that I'd like to achieve.

As always, thanks in advance!