I don't understand that either. Why when you look something up with something like the the SEOBook tool you get something with 60K monthly searches and the same word in wordtracker get's 3K searches every 90 days??? wtf? It's like that with all of them.
The weirdest thing is I never hear anyone give a good explanation for this phenomenon either.
I am not a search engine, nor have I ever been one, but I can see how numbers would be different between 'resellers' of the data.
Lets say data was purchased from Google (we know that ain't gonna happen).
Lets say we wanted 10 million top keywords.
Lets say we get the RAW data, and it contains searches like:
green widgets
+green +widgets
"green widgets"
+"green widgets"
widgets green
+widgets +green
"widgets green"
+"widgets green"
each with 10 searches a month.
'reseller1' may be wordthrasher, and they import straight from google, so their numbers match exactly: 80 searches.
'reseller2' may be wordsthree and they may filter out punctuation and duplicates. The results are MUCH different: 2 searches (green widgets & widgets green)
'reseller3' may be doing some other filtering.
If each offered the same results, it'd be up to features to make the difference. By offering 'different results' they seem more 'specific' or more precise.
Now, substitute Google in the example above for 7search, dogpile, momma, and all those other 3rd tier engines that most of these services buy from, and then throw in that THOSE ENGINES may be pre-filtering the data, then results WILL vary.
Once again, this is me thinking HOW this may come out to be different. I have no idea IF this is what is happening, but thinking like this helps me sleep at night

, knowing there is NO WAY I WILL EVER KNOW THE TRUTH, unless I become a search engine myself...
