which keyword tool is good

Hello all,
I just want to know that which keyword tool is best to use.
First is Market Samurai
Second is Keyword Canine

Where i am using MS extended trial version means free version and KC charged $200/year(too costly)
Dose KC hype too much or is it really have guts to dominate.
if KC really has value then please show the difference between both of them.
please guide me.
thanks