I'd say Bitcoins, but Paypal has more "audience".
There are much more people that using Paypal for payment instead of Bitcoins, it's like Paypal is more "user friendly"

It's not 'PayPal is more user-friendly', it is that people still haven't heard about BTC. BTC is being accepted. Once it is accepted widely, most of the users will start using BTC more than paypal like now as it offers least fees, more security and IS more user friendly than PayPal!

~~MZ~~