I wouldn't really call this a "report" when there aren't any metrics in the reasoning other than price.

Even in their own article, it mentions how support and updates vary by manufacturer so it's kind of meaningless to compare iPhone to the whole Android ecosystem. You'd need to choose one or more manufacturer in order to make an apples to apples comparison.

Without taking a position on the claim itself, this is a bad citation. It makes a variety of claims that either don't hold up to basic scrutiny, or aren't evidence that iOS has a security advantage. Here are some examples:

Open-source platform increases vulnerability surface area

This is perhaps one of the most thoroughly debunked pieces of FUD in the entire tech industry.

[Various claims about inconsistency between devices]

These are mostly true but largely irrelevant. You're not buying an aggregate of all Android devices that exist, but a specific device with specific traits. The Android phone you should actually buy will have a security chip and many years of updates just like an iPhone.

The rigorous app review process and mandatory App Store distribution (except in EU) virtually eliminate malicious app threats for average users.

This might be a benefit when the user has no clue how to use a computer, but I expect people posting in this community are past that stage. It's a big disadvantage for those who want to use something like Firefox (real Firefox, not a skin on Safari) with potential security and privacy upsides.