The Vivo Z1i is an upgrade over Z1, it comes with a different chipset, larger storage, and a better camera quality. Aside from that, it features a notch and a thin chin which gives you a large display of 6.26-inch.
Under the hood, it is powered by Snapdragon 636 with a 4GB of RAM and a 128GB storage with a dedicated slot for microSD cards. It also has a 16-megapixel front-facing camera.
Going back to the Vivo Z1, it sports a 6.29-inch 19:9 LCD Full HD+ display. It is powered by a Snapdragon 660 octa-core processor, paired with 4GB of RAM and 64GB of native storage, which is also expandable up to 256GB via microSD card.
Going to its optics, 13-megapixel f/1.8 primary rear camera, and 2-megapixel f/2.4secondary rear camera. For taking selfies it has a massive 24-megapixel f/2.0 front snapper.
The Vivo Z1i is available in colors Black with Gold accents of Red for the price of CNY1,898 ($285/€245) in China.