The 13th gen i9 in question has 8 performance cores and 16 efficiency cores, and 36MB of cache, whereas the 12th gen has 8 and 8, with 30M of cache, so it's not

The 13th gen i9 in question has 8 performance cores and 16 efficiency cores, and 36MB of cache, whereas the 12th gen has 8 and 8, with 30M of cache, so it's not that surprising it performs better.