2 Way Voucher Match - Price

I am trying to check if the price in 2 way match against voucher and PO is the same.

Comparing THE PRICE F4311.PDAEXP = F43121.PRAPTD for prmatc = 2

Is this the right field which is compared during voucher match program as sometimes there is a huge difference.

Also which field AP LEDGER F0411 can i compare between ap ledger and Voucher