Which mail service is better in terms of privacy/security, ProtonMail or Tutanota? And why?

First of all, I have posted the same as well to r/tutanota and /r/protonmail to get as many different opinions as possible.

I am in search of an encrypted, private Email Service and came across Tutanota and ProtonMail.

Now, I can’t decide which of them I should choose from a privacy/security point of view. Which of the two is better?

• Who uses the better encryption?
• Who has a more secure authentication?
• Who has the better privacy protection by law in their country? (Switzerland and Germany)
• Who has the better user interface/user experience?
• Who offers more privacy/security?
• Who has more/better features?
• The price is not a factor. I am just looking for the better service.

What I want to accomplish with this post is getting as much information about both services as possible, which makes the decision easier for me and maybe for other people in the future as well. My points above are just some things that came to my mind. If you have another point, please tell me as well. I am super interested in everything you can tell me about them.

Thanks in advance!