Ok i'm assuming they are Fei Fengs (the ones with kind of black stripes on the tail).... get both. if you do get both, be sure that your prochilodus size are equivalent to the jardini to prevent damage.
are jars really as bad as there cracked up to be cause im starting to lean more to the non agressvie fish now cause im tired of fish being beat up and i want all my fishes to live in peasce with each other