@Tutanota I wouldn't worry about this blog too much, I just read it and if I didn't know either of the services I'd get a better impression of you than Proton.

I am familiar and do use both services, but the blog showing a table of pricing where proton is x4 more expensive than your plans, and then saying that the winner in pricing is Proton... is a little indicative and reminds me of every other cheap blog that's on the internet.

That's forgetting at the beginning they show a table with features for each client, yours having more and getting a lower score.