The performance margins between the RTX 3070 Ti and RTX 3080 are so small that the RTX 3070 Ti can outperform the RTX 3080 in certain cases. If you want to avoid the slowest RTX 3070 Ti or RTX 3080 laptops, then this list might come in handy.
https://www.notebookcheck.net/GeForce-RTX-3080-vs-RTX-3070-Ti-laptops-Very-little-difference-on-average.614343.0.html