I am putting below the main points I see between Nintex workflow (2007/2010) and Bamboo Workflow Connector since I could not find any comparison with a quick good.
I may omit something or be wrong so I will correct and accept criticism if it comes.
Nintex : Approve/reject by email (Lazy approval)
Bamboo: none
Nintex: No Feature to deploy, therefore no disruption for end user.
Bamboo : need to recycle IIS= disruption for end user.
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