Hello.
All script files are available in CMSScripts/jQuery folder, so you can have a look and compare it with default files. I am not aware of any other significant change other than what I already wrote.
If you are looking for more info about jQuery.NoConflict() mode, I would recommend you some public articles like
this one. We use it for reasons I described, but it is framework-related functionality for make it work with other libraries (like I explained).
For more details please refer to public articles as there is no other Kentico-related magic behind this than what I already wrote. Thank you.
Best Regards,
Radek Macalik