The sound in the YouTube video is the regular Monte Carlo sound. I never heard a different one.
Did someone replace the soundboard from another game? The Original soundroms are labeled YROM1 708 - YROM2 708 and DROM 708. Also, most of the times there is a label present at the soundboard with the modelnumber (708 = Monte Carlo) and the serial number of the game.
Another possibility....you got a Spanish licensed built game (Vivico) but as far as I know, they used the same roms.