I have one of each (non-illuminated classic 3-12x50), and like them both, but they're different.
The crosshairs are a good bit thicker on the classic, which some people don't like (they say it obscures some of the target, especially at high mag), but it does mean that having illumination isn't so important in poor light.
If I absolutely had to choose one, it'd be the Zenith FD7, but I love the classic too.