How are scriptless scripts and taproot different?

How are scriptless scripts and taproot different?

I recently read Aaron van Wirdum's layman explanation of both scriptless scripts and taproot. I gather that both utilize the aggregation of Schnorr signatures to hide complex scripts (smart contracts) in a normal-looking transaction. What are the finer details that sets the two schemes apart?

http://bit.ly/2Usvkbw

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