NA22 E. coli vs OP50 E. coli

Please help me… Whats the different by using NA22 E. coli or OP50 E. coli as the source of food for C. elegans? Any advantage and disadvantage?

NA22 grows to a higher density than OP50, thereby providing more food for your worms. It’s typically grown on enriched medium (e.g., peptone plates), which further increases the density over NGM medium.