Walmart online shows two models of the E-Zip
The Mountain Trailz Hybrid Electric and the Trailz Hybrid Electric Men's

Can anyone tell me the difference between the two models as far as performance?

The Mountain model says Mountain bike frame and it is 6 pounds lighter
The Trailz says unisex and steel frame and its heavier.

Beyond that I see not difference in the two models. Is one better than the other that anyone knows?