They are very similar, however the Star is a more basic model. There are only cosmetic differences and the frame and seat are the same quality and functionality. 

The Zira is all colour coordinated on the bottom of the seat fabric carrycot where as the Star isn't

* The mesh on the shopping basket of the Star where the Zira is a full fabric 

* The bumper bar and handle doesn't have a leatheretter cover on the Star where as the the Zira it does