iPhone SE 2 will not have a physical appearance like the iPhone X. Thus, arguably iPhone SE 2 has a low-end device specifications. Possible iPhone SE 2 will have a physical look like iPhone SE.
Meanwhile, the body and frame are made of metal, bezel in the upper and lower body, and a physical Home button.
Reportedly, the difference between iPhone SE 2 and its predecessor is big screen, where iPhone SE 2 supported 4.2 inch screen. Slightly larger than iPhone SE, 5, and 5s.
For physical appearance, Apple will likely focus more on improving the specification of the device than the iPhone SE that has swung about 2 years ago.
Some leaked specifications iPhone SE 2 among others is this device is supported with A10 Fusion chip that delivers faster performance. Chances are, iPhone SE 2 is supported by 2GB of RAM with option of 32GB or 128GB storage space.
The same report also mentions the iPhone SE 2 will be released at WWDC event in June 2018. If this is true, it is likely that Apple will announce the presence of iPhone SE 2 in a smaller press conference around March 2018.