The i3 you linked matched. But for the i7 model, apple claims 1.2/3.8 and I can't see a match for that.

For the i5, they claim 1.1/3.5 which could be a match for https://ark.intel.com/content/www/us/en/ark/products/197119/... with the "configurable TDP" of 1.1 instead of base 800 MHZ.

If anyone can solve this mystery, it would be great to compare to other laptops like the Surface Pro, whose i7 is "Quad-core 10th Gen Intel® Core™ i7-1065G7 Processor"(1.3 / 3.9)