The Z2 is a major change from the v2...
It's more like the Rotor itself now with constant feed, I would have preferred it to the rotor had it had the option of choosing between sound activated and continuous feed. It gives you away when you are winchester now, like the Rotor buzzing when you are down to your last half dozen or so paintballs.
It has a built-in anti-jam as before and the addition of an auto-reverse function as well as manual reverse and forward stepping.
I would have thought that you might be able to get an LTD v2 Prophecy pretty cheap now that the z2 is out, I'll be keeping my eye open for one at the right price.
Never thought of looking back since I got a Rotor, but hey most people have a backup marker so why not carry a spare loader ?