Lotus Notes and WikiSuite have some similarities. This page is to explain the differences and rationale of choices. You likely will be interested in the other alternatives to WikiSuite. Since Lotus was later renamed IBM Notes, please see: WikiSuite vs IBM
Lotus Notes is interesting technology, and a little hard to explain.
Lotus Notes is an application suite that includes the following components:
Unlike other application suites (like Microsoft Office) that split these pieces of functionality into separate products (like Outlook, Access, Front Page, etc.), Lotus Notes presents all of these components using a single front-end.
Detailed explanation: https://www.nsftools.com/misc/WhatIsNotes.htm