Hi Sundar!
1. PayPal is good for International buyers and PaisaPay is good for both National and International buyers.
2. The transaction is instant through PayPal
The transaction remain pending for 1-2 days in some cases through PaisaPay
3. You will have to pay the service charge ($5 for PayPal cheque or $8 for Xoom cheque) for receiving your funds from PayPal account.
You will not have to pay any service charge for receiving your funds from PaisaPay account.
4. In PayPal you can withdraw funds anytime but minimum $150
In PaisaPay draft is sent weekly, no minimum requirement.