Based on what I see here https://phabricator.wikimedia.org/T226857, my understanding is that there may be some difference in how the web vs cli installer finds and connects with the Percona / MySQL DB.
I have looked through Manual:Installing MediaWiki as well as Manual:FAQ#Installation and configuration
My guess from these are that if there are some external extension dependencies, then the command line installation must be used. Is this true? And, are there other cases of such differences?
Where can I learn more about the differences between these two installation approaches?