AMD Ryzen 7 PRO 6850U "Rembrandt" Linux Laptop Benchmarks
In some of the cases it's quite a significant performance-per-Watt improvement over the Ryzen 7 PRO 5850U.
So even in cases where the 5850U and 6850U performance was similar, the Rembrandt SoC was looking very good in the power efficiency department.
Compile times between the 5850U and 6850U were similar but the ThinkPad X13 Gen3 configuration was consuming much less power.