Most of the online shops will accept paypal but not Bitcoin.Not yet!I hope this will change in the future.
If I could choose between those two to pay for goods in one shop I always would take Bitcoin of course.
BTC is faster, cheaper and only an delivery address for the goods is needed.
I like both Bitcoin and Paypal and I use them both. When it comes to online shopping Paypal is clearly the better option out of the two. Paypal is just world wide better known.
But hopefully in the future you can use bitcoins at more online web shops.
Paypal is maybe worldwide known but in fact they sometimes limit your account and also are sometimes very slow.
Plus its not exactly true that you can pay with the paypal worldwide because some country's are limited for some accounts(country's).
If this is gonna happen it would be a lot better than paypal..