First of all sorry for posting not about plugin or wp.org, but I need some opinion on my issue!
I had made two pretty much identical sites with duplicated content
kleithron.wordpress.com and klidaras.wordpress.com (there are in greek).
The klidaras is the first I've made and 2 months later i made the kleithron. Recently I started refreshing the second (kleithron), and I will change 90% of the content and the structure (post-category structure to page structure) and when I'm done I will delete permanently the other.
My question is :
Is it worth changing the existing site kleithron.wordpress.com, as matter of SEO / Google aspect ? Or google already had "banned" that site/domain, so it is pointless struggling with that and creating something from scratch ?
Thank you very much