Hi Trevin,
Both cameras are good for the price, but I would suggest the Z1U. I own and love both, but the Z1U has a few features that a professional must have. For example, XLR audio inputs, 4:3 safety zone guides, gamma control, 50i/60i selectable, downcoversion edge crop/squeeze/letterbox, and I think there was something else, but I don't remember what it is.
The glass and resolution is identical between the two, but if you are thinking about indie film making with a film look, I would suggest the Z1U in 50i mode and then drop it to 24fps in post production. Much smoother adjustment than going from 60i to 24p.
-Scott