Because this was reported last time with the M2 vs M1. The major performance improvements came from increased clocks, at the expense of some core stability.
These new cpus can bounce tracks faster, but are apparently worse at real-time processing. Most DAWs can only process individual tracks on a single thread.
If you’re monitoring while using heavy plugins then you may be more prone to dropouts on the newer chips.
The different # of P and E cores plays more into the multithreaded performance