user76844: Understand that each proof of work algorithm has its pros and cons.  
Difference between Hashcash proof of work algorithm and Ethash proof of work algorithm?
Nathan Aw

user48884: Hashcash and Ethash are two different things and not directly comparable. Hashcash is the idea of using hashes for a proof of work system. it can be used with any hash function.
Ethash is a specific hash function. It is used in a hashcash proof of work system, specifically the one used in Ethereum.
Hashcash is not comparable to Ethash because it is not a hash function at all.

76844: <p>Understand that each proof of work algorithm has its pros and cons.  </p>

<p>Difference between Hashcash proof of work algorithm and Ethash proof of work algorithm?</p>

<p>Nathan Aw</p>
 48884: <p>Hashcash and Ethash are two different things and not directly comparable. Hashcash is the idea of using hashes for a proof of work system. it can be used with any hash function.</p>

<p>Ethash is a specific hash function. It is used in a hashcash proof of work system, specifically the one used in Ethereum.</p>

<p>Hashcash is not comparable to Ethash because it is not a hash function at all.</p>
