Apple's new 2020 iPad Pro models are equipped with an A12Z Bionic processor that's remarkably similar to the A12X chip in the 2018 iPad Pro models, offering little in the way of performance improvements.
The A12Z does, however, feature an 8-core GPU while the A12X includes a 7-core GPU, which sets them apart, but new evidence shared by NotebookCheck suggests that the A12Z Bionic is simply a renamed A12X chip with a latent GPU core enabled.
According to NotebookCheck, teardown site TechInsights confirmed that the 2018 A12X chip physically has 8 GPU cores and not the 7 GPU cores that Apple includes in tech specs. One of the cores of the A12X is disabled.
The A12X and the A12Z appear to be the same physical chip on the surface, with the same number of physical CPU and GPU cores rather, suggesting the A12Z is not a new design. AnandTech has also speculated that the A12Z is a re-binned variant of the A12X.
This is a companion discussion topic for the original entry at https://www.macrumors.com/2020/03/26/a12z-bionic-renamed-a12x-chip/