An excellent way to compare data sets with the same column headings is to list them under each other, and add a new column called "source", and populate that source.

Then create a pivot table, and add source as the column field.

Then you can easily spot differences. Here's an example for comparing Trade PVs

Create pivot with rowfield = Trade Number, data field = Sum of PV, and Column field = Source then add a column called "DIFF" to calculate the differences in PV

You can see the total diff = -330, and Source 2 has a missing trade Download the example file to see how it works