Google Keyword Tool and IBP Keyword Tool - Which one is more correct?

I’m currently using google keyword tool and IBP for the keyword analysis. But the thing is both tool are stating different numbers, for example:

As Per Google Keyword Tool:

Global Monthly Searches for the keyword iPhone to PC Transfer: 301,000 and Local Monthly Searches (US): 110,000

And as per IBP Keyword Tool Local Monthly Searches for the above keyword is less than 10

So I’m little confused by these stats. Can anybody tell me which one is correct? And the above keyword is worth to traget or not?

In my opinion Google keyword tool is best for google and more accurate than IBP. But for other search engines you can use micro niche finder or market samurai, but both are paid tool.

Google keyword tool is marvelous tools and it gives you exact result of particular keyword. So no need to run in search of other tools.