What's the difference between PDC bit and the tricone bit?

STUPID QUESTION...SOUND JUST LIKE A KID

PDC MONO BLOC

TRICONE TROIS MOLETTE

PDC means Polycrystalline Diamond Composite or Compact. PDC are made by combining some layers of polycrystalline diamonds (PCD) with a layer of cemented carbide liner at high temperature and high pressure. PDCs are among the most rigid of all diamond tool materials.