Paypal
On 1 October sender sends 1000 US$ plus total fees 44 US$ ( 4.4 % ), and at paypal exchange rate we receive 29117 thb on our bank account minus a paypal fixed fee of 11 thb : 29106 thb is what we receive from the sender's 1044 US$
29106 thb / 1044 $ = 27.87 thb are received per $ sent to paypal
TransferWise
On the same day sender sends 1000 US $ plus total fees 10.77 USD, we receive at TransferWise exchange rate 30354.52 thb on our bank account.
30354.52 / 1010.77 = 30.03 thb are received per $ sent to TransferWise
30.03 - 27.87 = 2.16 thb per $ is how much you lose when using paypal instead of TransferWise or a similar money sender on 1st October 2019 when sending in the 1000US$ range.