The current top results for single core performance are ~3,100 so it is, on paper, a substantial gain. The M3 in the iMac achieves around 3,053.
However, Geekbench is not that great (imo) so it does not necessarily indicate what you can expect overall performance to be or improve by between CPUs.
However, Geekbench is not that great (imo) so it does not necessarily indicate what you can expect overall performance to be or improve by between CPUs.