[SB] Difference between Backlink checker and Link extractor addons?

What is the difference between Backlink checker and Link extractor addons in Scrapebox?
When to use one or the other?

Thank you

Could it be that the checker only should check for your links on all the blogs/sites, and the extractor is if you want to extract all the links from the blogs/sites

extractor use to extract internal or external (or the both) links from url.
backlink to verify if your backlinks are stille here

Link extractor addon will scrape all links from your target pages (you can set internal, external or both) - this would be usefull if you where checking the domains from other comments on a blog.

Backlink checker Addon (Not to be confused with the check links main option) will scrape your target page(s) backlinks from Yahoo site explorer. This might be useful if you where trying to match your competitions backlinks.

Used together these can produce some very nice lists if you use your brain.

I am sorry, but that is not very clear for me, i do not see the differences between them!

Link extractor addon finds links ON a page
Backlinkk checker addon finds links TO a page