SEO tool fatigue is a real issue for some folks. Some people spend a good chunk of their productivity on testing or trying out new tools, or even using so many tools that their implementation and interpretation of data suffers a great deal. One tool says this, another says that, and yet another says 1 or the other or both or neither 
.
The first thing to realize is that most of the data from tools (excluding analytics and such) are basically estimates of estimated data, or are directly from Google’s various estimation-type tools (Keyword Tool, Trends, Insights, and so on), or driven off what the tool builder thinks are important or reliable metrics to build your research off of (there tends to be some swings and misses with that type of approach).
You are not going to fail miserably if you decide not to do days and days and days of keyword research with multiple tools and then spending more days comparing different datasets. Research is important, but there is a limit.
