Wordtracker is a paid keyword research tool and has wider options in it whereas Google's keyword Tool is free of cost but gives you all the minimum required information regarding a keyword. Which do you prefer to go with and why?
i always use google keyword tool, regardless of how many keyword tool out there. I can use as many as I want, but will nevel leave GKT
Google is the main search engine and everyone go with google for searching somethings. If you want traffic on your website search keywords from google keyword tool and above all its a free keyword tool with the accurate results whereas wordtracker is a paid tool no doubt, it also shows accurate results but google is the best.
Google Keyword Tool works pretty good. After all, its for google you are trying to find keywords for, why not to use the tool the search engine itself created?
I use Google Adword Keyword External tool, but after that I also use Stealth Keyword Competition Analyzer
Google Keyword Tool is tool created by Google itself it has real data from people searching all over the world. Wordtracker on the other hand just calculates results as stated in one of their own tutorial videos (well what else could they do they are not a search engine).
google can give you a detail about keyword analysis free of cost where as word tracker get you paid for this.