Any tool for checking DUPLICATE CONTENT ?

If i have 2 articles, one a rewrite of the other, and wish to check each one against the other to see how well it has been rewritten - or if major chunks of it are unchanged (due to the rewriter being lazy) then

i can check the article manually with my eyes, reading it, but this is time consuming,

is there any tools online or software applications which let you check the similarity of one article against another? and points out that they are completely different, or that they are very similar, with just a few words changed here and there?

I don't mean copyscape, to check a url,

basically: a tool to compare 2 similar articles side by side and check for their similarties, to see if there content is similar, is there any tools?

 

You can try this content checker tool located here @

http://www.softpedia.com/get/Office-tools/Text-editors/Duplicate-Content-Checker.shtml

Hope that i'm helping...

 

Please search first. This has been asked and answered quite a few times here, with several resources given.