The information is incorrect. AMD XDNA2 in Kraken and Strix point has 50TOPS BF16. The NPU in this SBC must be INT8, and performance is limited by slow RAM.
From the complete specifications of the NPU...
AI accelerator – Up to 30 TOPS Neural Processing Unit (NPU) with support for INT4/INT8/INT16, FP16/BF16, and TF32; Note: Up to 45 TOPS of AI performance with CPU+GPU+NPU
Which isn't to say it's slow, but the article might be a little misleading in comparing performance.