You mean this [...]
But that's no CPC fault, the ceiling and the floor can be rasterized on CPC as the ship nor the bullets touch that parts (extra colors), the rest of the graphics can be recolored and use dithering technics to simulate more colors, and the hiper-mega-black-box that the engine on the spectrum do to avoid the color clash.. come on, that's no serious
and again, without comment on mode 0 graphics (r-type 128k remake)