This is a huge step up from the Dimensity 9200 series, which only had 1 Cortex-X3 core. The remaining cores are improved too, with the smaller Cortex-A510 completely gone, so it’s 4 Cortex-X4 and 4 Cortex-A720, up from 1 Cortex X3 + 3 Cortex A715 +4 A510.
The clock is not really that big an improvement, as the 9200+ had the Cortex-X3 running at 3.35 GHz. So that’s actually reduced a little bit for the Cortex-X4 at 3.25 GHz on the 9300, but of course 4 instead of 1 will make it way faster, and any IPC improvement will help too.
This is very exciting news, it’s very impressive how far Mediatek has come, from being just a maker of cheap components. An image they still have against them to some degree I think. But now they are at the cutting edge, making bleeding edge SOC’s.