The big question is whether the cooling system in the 13" would be able to handle the HS. Is there any data on Zen 4 laptop chips that has tested the efficiency vs performance considerations on the U vs the HS series?
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.
"For the AMD Ryzen™ 7040 Series processors, we’ll be sharing more detailed specifications as we get closer to shipment."
Source: https://frame.work/gb/en/blog/framework-laptop-13-with-13th-...