This sounds very similar to the dgx spark, which still hasn't shipped afaik.

The CPU cores are very different (big Cortex-X925 + small Cortex-A725 vs. medium-size Cortex-X4 = Neoverse V3AE).

The CPU of DGX Spark has better single-threaded performance, while that of Thor has better multi-threaded performance per die area and per power consumption.