User blog comment:Sjjtitan2019/Itemization and Build Paths/@comment-6000413-20140110154615

I would say quite the opposite, actually.

As an AP yuo can build full AP+penetration+CDR for full damage OR Add some defensive stats in there, or some utility.

As Ad your core items deal only damage (it doesn't really matter if it's from crit, ad or AS), while the items with defensive stats are much more limited: Frozen mallet, Atma (out of the meta), Maw, Scimitar, Wit's end. So, as you can see there's some nice MR +AD items, but very few HP+AD, one armore+ad+crit, no armor+AS, no hp+AS, no crit+MR.

I personally find the choices of ADCs much inferior to those of APCs.

Moreover, consider that while an APC marginally benefits form ADC itmes, the reverse is completely false.