Well think about it. CPS1 has better resolution, runs 60hz, there is possibility for 3000 colors on screen from 65536, has 256 sprites per scanline, the max. sprite size is 256x256, has 3 tile layers, 384 KB video RAM, games have size as big as 8 mb or more, zero loading times due to ROMs. Last but not least games made by professionals for a huge crowd (arcade).
It's a little monster. You cannot expect miracles here like running same quality games on Amiga 500.