if you refer to the models released by the same manufacturer, Oppo, they are practically the same, as comparing Galaxy S 5 with mini Galaxy S 5
In practice, Mirror 3 has more storage capacity, 8GB, comparing wiith Neo 4S, based on 4GB
In addition, in Mirror 3 case, you can expand the storage capacity to 128GB, while in Neo 5S were are limited to 32GB
Mirror 3 is bigger, based on a 4.7-inch display, as well it includes a bigger camera of 8MP
