Nov 21 2019 07:57 AM
Nov 21 2019 08:51 AM
How about doing a simple search? If you want detailed comparison between the two, the service description documents should do: https://docs.microsoft.com/en-us/office365/servicedescriptions/exchange-online-service-description/e...
Nov 21 2019 11:08 AM - edited Nov 21 2019 11:11 AM
The main difference is one lets you connect with Desktop Outlook and the other (cheaper) is Web / mobile only. But there are many other back end related and access rights to different features to consider which Vasil pointed out in the article he linked (It's down the page away).