Adwords KW Tool vs Search Based KW Tool

[CaseyC]

I have recently been using the new Search Based KW Tool from Google as a supplement to the SEO Tool KW Tool. However I was comparing some numbers given by the Search-Based Tool against some numbers given by the Adwords KW Tool and they are worlds apart. How can two KW tool by Google be some completely different? Which one is more reliable?

[AussieWebmaster]

Aaron's tool uses yahoo and msn numbers as well

[CaseyC]

right, but can you tell me why those 2 Google tools report such widely different numbers?

[jag]

You may check this Google Help http://www.google.com/support/sktool/bin/answer.py?hl=en&answer=114875

Best,