Can any body tell me the core difference between Old Domain and New Domain. What is the major difference between them.
the new one can be used as spam . . . G and other search engines like to know what type of site they are releasing through their flood gates and an old one has already established a presence for what ever it maybe . . . SPAM or not but the simple fact is that it is an older site and now is known for whatever it is known for.
Old domains have pages that is linked and chached in most search engines like Google. Going after totally new themes for old domains is a bad idea in SEO concept. Also, some old domains are not well taken care and have a lot of spam backlinks and got penalty from google. Check on that also. New domain is like a fresh cake. You need allocate your work on contents, ranking, etc.