Looking for a very low power racquet...

Nellie

Hall of Fame
According to that TW University function, the K90 is more powerful than the Pure Drive.

What is interesting is that the greater power is only in the center sweet spot, but drops off tremendously as you move away - therefore, K90 has a lot of power power but is unforgiving.
 

FH2FH

Professional
most people can swing a pure drive faster than a k90, so the extra weight/power can't be utilized. weight is key for stability though.

the PD is also more forgiving in some ways because the entire stringbed is stiff/consistent; eg, hits at the top of the frame have closer power to ones just below the center.
 
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