I don't own the Mini, but I do have the Note 2 and Nexus 7 and I've found that the Note 2 completely replaces the tablet, for me at least.
I will say that while the Note 2 is amazing, the size is a pretty big deal (again, for me...others experience will vary). While I can easily fit it in my pocket, it can be unwieldy when holding it. It makes my S3 look tiny in comparison.
I'm actually looking to sell the Note 2 and S3 right now to help fund the upgrade to the S4. That has nothing to do with how much I like either the Note 2 or S3 (I love them both), but I like to have the latest tech, so upgrading to the S4 is a no-brainer for me.