No, just a personal preference. In terms of strictly deflection, I think the Z2 and the OB2 are a step above the rest, especially the Z2. All that technology talk does add up to "something.
But regardless of that, I'm not really looking for a cue with the LOWEST deflection, just something more manageable than the obscene amount Schon shafts have. So to me, the WD700 hits like a schon, without the cue ball going 45 degrees of where you aim.
I think the personal admiration for the hit is more important than the actual deflection properties. Most of the better ones are pretty close (314, Z, OB 1/2, WD700). OB classic actually has noticeably more than those others I've shot with/owned, but I do like the hit a lot more than the OB 1/2. I simply can't stand the OB 1/2 really, the hit, the sound, it's all off.