Determining Uniquess of Spun Articles

Clients sometimes need "pre-spun" articles which are rather unique to each other.

Here is the problem: TBS provides an option to "spin-out" a number of articles, say 100, and then shows a nice table with the uniqueness numbers etc...but it does NOT have the option to auto-delete pre-spun articles which are "not so unique" to each other.

Spinnerchief DOES have this option, but SC is extremely unreliable in a sense it constantly crashes, furthermore (up to this date) i still havent figured out what the difference is between the two methods Spinnerchief uses to determine uniqueness.

(Our articles are usually sentence plus word spun).

So..what i am looking for is either a web site/service or a spinner software/tool which allows to spin-out a certain amount from a given spintax article and then compare them to each other. And there needs to be an option so articles which are similar (like 50% similarity criteria etc.) can be deleted.

This way i could give clients an answer eg. when they ask me how many "unique" articles a spintax article will produce, and i can deliver them a set of pre-spun article which are all rather unique to each other.

Any idea about a tool which can help there?