On previous generations: the 4000 series starts to hit a relative performance wall at around 35W. The 5000 series clocked higher and hence gained more moving from 15 to 35 and 35 to 45.
Another point: you can throttle the 35W HS series to 15W, and get the laptop to run fanless or almost fanless since it is designed to cool a higher TDP.
On previous generations: the 4000 series starts to hit a relative performance wall at around 35W. The 5000 series clocked higher and hence gained more moving from 15 to 35 and 35 to 45.
Not sure about the 6000 series, but you can see for yourself: https://www.notebookcheck.net/AMD-Ryzen-7-6800U-Processor-Be...
Another point: you can throttle the 35W HS series to 15W, and get the laptop to run fanless or almost fanless since it is designed to cool a higher TDP.