Come on guys... what makes a zombie a zombie is that you have something that was once human, maybe someone you loved, that is now a vile, soulless wretch. The point is that when you look at a zombie you are looking at a gross perversion of humanity. Something that isn't right. Something... evil...
That is why this "anti-running zombie" crap is just rubbish. Either way you are looking at something that horrifies you because on the surface it looks human, but in reality it's only thought is to disembowel you.
But that is the "zombie" itself. The real distinction between walking/shambling and running zombies is the emotion they trigger. "Original" zombies cause dread, hopelessness, despair, and panic (at the last seconds before death). Mostly dread. Running zombies cause dread when they're not around, but mostly panic and terror.
Not so much the creature that is different. On the whole, you have something that vaguely resembles a person, but on the inside there is no soul. Only malice or the need to feed or kill.
But realistically, no one could survive a running zombie outbreak. Which is sad, because that is the one that is more likely to happen some day (not that either will, lol...).