Windows workflow foundation persistence with database vs correlation

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Windows

workflow

Hello,

My main task is to take approval/rejection on certain item on my web application and for which I'm using windows workflow foundation. In my app when a user submit a record then I want it to get routed to a certain person for review and take response of it.

Now I'm doing this using workflow persistence I've tried using database by following this example [^] I've made connection with persistence database and save workflow instance and I've also resumed my workflow from saved instance. Once I've done all this I found out same can be achieved using correlation as explained here in this example[^].

Now my question is what is the best approach here should I follow the example from the blog post of petegoo.com as which is best after deployment can any one suggest me

What I have tried:

I've implemented persistence mentioned here

A Developer's Introduction to Windows Workflow Foundation (WF) in .NET 4[^]

now I'm worried what is the difference here which is mentioned in this example

Workflow 4: Human based workflows with an Email Approval Sample – PeteGoo[^]