When linking to external websites from an app. Is it better to use web view or open in a browser?

I'm working on a travel app that sometimes needs to link to its web version for information that's not within the app itself. For this I believe using a web view makes sense.

However there's also a need to link from the app to external websites that give more information on various travel restrictions e.g. immigration of various countries. In this case should it be

  1. web view
  2. opening in a browser

while the web view seems more seamless UX wise, it may confuse some users that this is a part of the app.