Greetings Rahul --
I knew the question of overlapping would surface eventually, so thanks for bringing this up.
Before I started the netizen project, I did survey the other spins especially the security spin because of its completeness and wonderful efforts. The justification to reuse the same security packages was revealed to me not from a spin developer perspective, but instead for the targeted end user's perspective. Correct if I am wrong, but the security spin targets more technical end users while in contrast the netizen spin will target novice to mid-level users in need of basic security and safety applications. I will flesh this difference out in upcoming documentation and branding in the future. In addition, netizen targets alternative industries, perhaps less technical organizations.
So, in sum I made an initial to effort target different end users and different industries for spreading fedora goodness. I hope was not on my soapbox too long. ;)