there is a lot to say about and probably some Trello experts will chime it and add some stuff to two links I want to post before anything specific :-)
There is a page from Atlassian which compares the features on a table based on facts:
If you want to read more about the background I recommend the article from Urszula that discuss that topic from a more "personal" angle.
In case of further questions let us know - the above is surely only a first step of answer.
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