This is probably on a case by case basis John.
As an example, I'll look at Search Engine Journal
First, 3,460 backlinks for SEJ on Google:
First 10:
Quote:
google.blognewschannel.com/
blogherald.com
ysearchblog.com
blogs.msdn.com/msnsearch/
searchenginewatch.com/searchday/article.php/3412721
tech.memeorandum.com/060120/p68
blog.startwithalead.com/weblog/current_affairs/
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63,300 backlinks on Yahoo:
The first 10 are quite similar, more clean and listed by domain:
Quote:
blogsearchengine.com
www.google.com/googleblog
ysearchblog.com
blogherald.com
dailyrotation.com
blogs.msdn.com/msnsearch
ysearchblog (internal post)
blogs.msdn.com/msnsearch (internal post)
jimboykin.com
google.blognewschannel.com
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Both are appropriate measurements of quality external links, although Yahoo's are a bit more relevant. As you can see, some similar blogs/sites are considered top 10 backlinks by each, blogherald.com, google.blognewschannel.com, ysearchblog.com, and msn. I would identify allof these as industry authorities.
Yahoo seems to dig back deeper for long term links, as blogsearchengine has always linked to SEJ, and daily rotation is one of the first links I ever received.
I think that the quality of both results are comparable, atleast for the first group of results, it's the quanity which differs.
Yahoo has more backlinks listed, but when I go to view over 1,000 of them, most of those are omitted from the results.
When I look at the last 991-1000, 9 of those links arefrom spam sites and alot do not even exist anymore.
On
Google however, if I look at results for the last 900-950 backlinks, more quality sites exist, although a lot are for internal pages to quality sites which were listed beforehand.
My non-scientific conclusion is that Google is showing a higher percentage of quality links in its backlinks results and Yahoo, although listing alot, is listing alot of crap.