Vaidyanathan Subramaniam, writing for NotebookCheck:
Essentially what this means is that, the A12X and A12Z are the same physical chip (pending the results of the A12Z floorplan analysis) with the same physical number of CPU and GPU cores. Anandtech feels that the A12Z could, in fact, be a re-binned variant of the A12X. Recent comparative benchmarks have also shown that the A12Z offers minimal performance improvements compared to the A12X.
The A12X has 8 GPU cores, but only 7 are enabled. The A12Z uses all 8 — that pretty much explains the “CPU performance is the same but GPU is slightly better” benchmarking differences completely.
Update: To be clear, this ought not be controversial in the least. See this thread on Twitter from Quinn Nelson.
★ Friday, 27 March 2020