Difference between Seomoz Competitive Domain Analysis and OSE link data?

[fibers]

Any reason these numbers are so much different?

SeoMoz Competitive Domain Analysis:
Followed Linking Root Romains: 288
Total Linking Root Domains: 338

Open Site Explorer
Linking ROot Romains: 127

[Copstead]

I would guess that you are looking at two different metrics.  Are you looking at the sub domain, or root domain (not what is coming in, but the page that is being analyzed)?

www.example.com (sub domain)

or

example.com (root domain)

or page specific.

[Cyrus-Shepard]

I thumbed up Brent's answer, because that is typically the case. It's super easy to go into OSE and look at metrics to a domain either with or without the "www" when you meant to do the opposite. So when the numbers don't match up this is the first thing I check.

Also, OSE tends to update faster than the Competitive Domain Analysis, so occasionally there is a lag time of about a week. In this case however, the numbers are so far off I suspect this is not the case.

Let us know if we can be of any help. Thanks!