Center speaker - Dynaudio Contour vs ATC C3C

Hi guys, I am trying to make out my mind between the two.
The speakers are both used and are similarly priced.
The ATC is harder to drive, but unlike the Dynaudio can be Bi-amped if needed (2X100w channels).
Any recommendations about which to choose? (preferably from someone who had had the chance to hear them both under the same conditions).