They are both good, but I think we cannot compare them because they are both very different.
The bitcoin wants to be a real currency, Paypal just wants to be a pay method and is not a currency at all right ?
Overall I do like the bitcoin more because its faster and also more secure and cannot get limited.
for me the difference is in the rules you have to follow. when using bitcoin there is none. but in order to use PayPal you have to agree and obey their terms of services.
just search how many accounts has been restricted and for the stupidest reasons in paypal.
Everyone has their own choice to choose their own payment method and that is good and we should respect their choice, some people like Bitcoin more than Paypal.
But I think that Bitcoin is now getting more popular in using now than Papyal so that is not that good for Paypal itself.