User blog comment:Tails365/Phantom Dancer SV Statikk Shiv/@comment-5556439-20130502143931

It depends on your playstyle. For a true ADC build, PD is better. Although if your more of a "special"(for a lack of better words) player, then Shiv can be a bit stronger.

On Quinn Shiv is absolutely worthless. She can benefit from the Passive but the main reason you take Shiv on some ADC's like Vayne, or Ezreal is so you can have some waveclear and extra DPS from its stats.

If you notice at all, the ADC's that take Shiv are ones that can spam the shit out of its passive, rely on more than AA's to deal damage, and ones that dont need as much raw AD.

Its for champions that have good bases(That means champs that dont itemize as harshly), scale well, or need some extra stats for cheap. It fits Tryndamere, Shaco, and Draven(barely).

I take PD on everyone except Ezreal.