Probably, the laptop did not have the specialized NPU (such as DEEPSONIC in Audeo Infinio Sphere), and the AI processing was done by a less dedicated GPU, which requires more power (I assume; I have not read about it yet).
EDIT:
Some specification of laptop here:
The CPU processor is from Q2 2018:
https://www.intel.com/content/www/us/en/products/sku/134876/intel-core-i58300h-processor-8m-cache-up-to-4-00-ghz/specifications.html
The graphic card with GPU is from Q4 2016:
