I recommend watching the video and reading this topic which compares the privacy of various OSes. It doesn’t specifically mention Samsung, but you’ll see that OEM Android is significantly worse than stock iOS and Android.
I do not like the guide you linked. It is not only extremely misinformed in its recommendations but is also spreading FUD.
Low-hanging fruit
- False claims about iPhone and Pixel security despite being the two most secure phones available with no obvious winner (stock vs stock). Source.
- Uninformed in recommending F-droid, read PG’s write-up here.
- Recommends a stupid amount of apps that most reasonable people will never need, which is a significant security and to a lesser extent also a privacy threat (naturally depends on the specific apps).
In my opinion, you would be much better off with an iPhone than a Samsung device. As I was getting at in my previous post, iOS and GrapheneOS are really the two options most people recommend. It’s worth noting that the only phone Privacy Guides officially recommends is Pixel (for its security characteristic more so than its privacy).