This link is a terrible source. In one of the graphs 4060 is faster than 4070. This speaks to the quality of testing.

In some power constrained scenarios that sort of thing is often petty reproducible.

Especially if the different SKUs have different power budgets. Laptop GPU naming and performance is a bit of a mess, as in the example shown (the 4060 on the Asus TUF Gaming A16 has a limit of 140w GPU+CPU, while the 4070 on the Asus Proart PX13 has 115w GPU+CPU - and even that is a "custom" non-default mode with 95w being the actual out-of-the-box limit).

With wildly varying power profiles laptop graphics need to be compared by chassis (and the cooling/power supply that implies) as much as by GPU SKU.