I'd like to start out with a "well duh". Specialised hardware is going to be better than lesser-specialised hardware. A transation-ASIC will probably shred the Power10.

POWER is specialised for record-based operations, and is specialised for traditional mainframe workloads. Granted, most of those specialisms are best used in a mainframe context, but even all stand-alone cores in a workstation they still retain most of that benefit, purely based on instructions it supports.