outrun

For sale Sega STv-1 Motherboard working with non working Die Hard Arcade Cart $80 4 64MB ram chips for a cps 3 send me an offer will set price soon just trying to determine fair market value. 2 Soul Edge PCBs working 60 each Sega Outrun board pulled working $290 Sega Pitfall Board pulled...

Is there any difference between the 512MB and 1GB versions of various Chihiro games like Outrun 2 SP? Are the graphics improved due to the ram usage, or is it just that the games are programmed to work with different ram settings, but are the same?