Say the row count from both tables are matched. It doesn't mean your original table is same as the copied table.One way to be sure is run a query which look for the difference by compare both tables. Row by row.
SELECT
[PARTSNNU],
[PARTMADEIN],
[PARTNAME]
FROM DB-PRO.dbo.PART
EXCEPT
SELECT
[PARTSNNU],
[PARTMADEIN],
[PARTNAME]
FROM DB-DWH.dbo.PART
So the query select few columns from both tables in different databases then look for any exception, which is a distinct value exist on the left table only. If both the data value on both tables are the same, there should be nothing to return on the result set.