Hello,
I'm not able to read the content, but just looking at it side-by-side, the content appears to be very similar. You may want to consider re-writing a bit to make the pages a little more specific to their topics. I understand that the topics are closely related, and we encounter issues like this on our site as well - there are only so many ways you can write about a rail pass! But, by changing the copy up a bit, you'll garner better SEO results.
It has been my experience that search engines scan from top to bottom, so especially your intro paragraphs on each page should be different copy, just looking at these two pages, they seem VERY similar including the headline: Een vaste rentevoet, dus geen verrassingen is there an easy way to change this copy up a bit? You may want to consult with a copywriter who should be able to assist you with this.
Good luck!
Amiee
