Wilson Sophia 3 is easier to drive than Sophia 2 ?

" The sensitivity’s are the same between the Sophia Series 2 and Series 3.  The Series 2 was measured at a voltage of 2.83 volts - the Series 3 was measured at a voltage of 2.0 volts.  When you bring in the 4 ohm impedance, the 2.83 volts adds 3 dB.

Hence, they are the same."

Sophia 2 89db

Sophia 3 87db. 

but I read many things and some say that the 3 is more difficult to drive.