I have both types. You cannot go wrong with either. I do prefer the split door of the exo's over the one glass piece of the zoo meds. The exos come with a background if you do not want to make your own, where the zoomeds come without.
The zoomed has one large screen top, where the exo is split into two sides. You still have to cover both to keep the humidity up. Both have slots in the back of the screen for cords, the exos have a sliding piece which is a lot better than the zoomeds snap in place plug.
The lock feature and locks are better from exoterra - if you need to lock it.
If you want a water feature the exos give you more room at the bottom of the tanks than zoomed.
I do prefer the light hoods of the exos and use them on my zoomeds, using the GE 6500K lights.
I would buy either in the future as you cannot go wrong with either.