Nvidia allows laptops to have 140 W GeForce RTX 3070 GPUs and 100 W GeForce RTX 3080 GPUs which can lead to some peculiarities in raw performance. Certain laptop models with the RTX 3080 are going to run consistently slower than models with the "weaker" RTX 3070 because of their wide overlapping TGP ranges.
https://www.notebookcheck.net/This-is-why-Nvidia-TGP-is-important-Some-GeForce-RTX-3070-laptops-are-already-outperforming-the-RTX-3080.521679.0.html