In right formation & application, PDC can drill as twice fast as tricone or even more. You can save tons of time & money.
PDC fixed cutter bits are solid and consist of no moving parts. PDC bits are made by combining fine grained artificial diamonds and tungsten carbide under extremely high heat and pressure, so PDC bits have a longer lifespan.
PDC is idea choice for some formation condition. It works well in consolidated, homogeneous rock, such as shale, sandstone, limestone, sand, clay.
When your rock as about mentioned, you can try out PDC bit as a fast, safe, rebultable ( low cost in long run) solution.