

While the rendering engine (WebKit) is the same across iOS browsers, WebKit is an open source project. To my knowledge there isn’t any telemetry baked into WebKit that reports back to Apple or whomever about user identity or behavior; tracking would have to be added by the developers making use of WebKit for their browser, I think? So in terms of privacy, it should make a difference which iOS you select.
Wow, I didn’t know iCab was still being developed. I remember it from like 20 years ago.
Its iOS app store page says it doesn’t collect any information, so that’s promising. The recent reviews as of version 11 aren’t great; lots of bugs apparently. I might try it nevertheless.
Thanks for the recommendation!