The biggest differences between PS2 and PS3 are not operational, rather, they are under the hood.
PS3 has a much greater capacity for sound memory and also a much faster FPGA (field programmable gate array) DSP (digits signal processor) that serves to improve signal strength over PS2 engines with allTIUs, but especially when used with a Rev. L TIU.
Later Premier PS2 steamers had a wireless ether, however, all PS3 steamers have a wireless tether.