I can see why every website owner would rather stripe than paypal. Also as stripe integrates seamlessly into your website, there are fewer steps involved eg: enter credit card details, done!
Yet while I find this great as a developer, as a buyer I’d rather use Paypal. I prefer to being redirected to Paypal, to have to login to my Paypal account, make payment and get redirected back.
The sense of security I get from this is worth so much more than trusting a third party with my credit card details.
Paypal is also the most widely used Payment operator on the web. It just means more people recognize it and will be willing to pay you. Also setup is quite easy, all you need to do is add the Paypal button on your site.
That said, it depends on many factors, mostly market demographics. Impulse buyers will generally prefer the most common method of payment i.e. Paypal. Other audiences might not want to use Paypal at all or live in a country where Paypal is not supported. My advice is to pick the most easiest payment operator to implement first and to watch your buyers and keep adding more based on feedback.