Sophos Central Endpoint and SEC: Computers fail/hang on boot after the Microsoft Windows April 9, 2019 update. Please follow knowledge base article 133945

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Differentiate Between Sophos Central Email and XG Email Security

I have been trying to find the difference in security level vs availability for securing my email traffic. 

I have subscription for both Email in XG and Sophos Central however i am not sure which to use.