Folks, it appears the original question continues to go unanswered here.
So, I will simply answer it. Yes, the two outlook services are not related other than the name "outlook."
But to answer the QUESTION....
ANSWER:
As a 365 subscriber, you will still need to either pay to remove adds from Outlook.com OR, simply install a Firefox extension (also called add-ons or plug-ins) like "Webmail Ad Blocker."
This is a program that will do outlook.com among other webmail providers and sometimes give you back that screen real estate in the process as well. Outlook.com ad blocker is currently only available within Chrome, but like I said, there is the other extension
called "Webmail Ad Blocker" extension for FireFox that works great!
Take Care,
US Born
[Part of the post that is not related to the topic was removed.]