A bit more than half the speed of an M1 according to a benchmark I found (sorry, the link below is in German), but with 32 GB RAM instead of the maximum 16 GB in a Mini.
Now the interesting question is if this box is locked to booting Windows or if one could also boot an alternative OS...
https://www.notebookcheck.com/Benchmark-Leak-Der-Qualcomm-Sn...