What's a good calculate similarity % ?

Hi everyone just purchased SpinnerCheif Ultimate and first post here!

I have a question about the spin calculate similarity feature, what % would you guys say is a good rule of thumb to keep the similarity percentage below ideally for your spun articles ?

And how much of a necessity is it to use Copyscape to check my spun articles or should I be able to use this calculate similarity feature to keep me safe ?

I ask this because the check Duplicate Sniper free for Ulimate users always tells me there is not duplicate content even though it's a straight up copies article, so I'm taking it that i cant rely on that ?

Thanks

I heard under 50 % similar is good.

Always strive for under 10% similar or more than 90 % unique, but if you cant it is ok.

Now if you copy and paste an article from a site, you want close to 100% has possible or least pass copy scape.

You can achieve a lower similar article by sentence spin, where rewrite each sentence at least twice. paragraph spinning - tips approach

I have good news for you I just save a bunch of money on my car insurance. lol

Spinner chief can spin sentence (not all) and paragraph (tips) for high unique