whats the differnce between the surge and pure drive

[cantaloupe]

Hi, I recently hit with te pure drive and I loved it, however I will spend 360 for a pair of these, so what is the difference between the surge and the pure drive? which one do you prefer? why?

 

[martin]

The surge feels more headlight and the pure drive seems to have a bigger sweetspot with a more cushioned impact.
I prefer the pure drive but only slightly.