User blog comment:N00bpl0x/Why are some ADCs considered superior to the others/@comment-3329234-20130629005310

Draven lvl 1 and 2 should be able to trump pretty much all others in sheer damage if he can get into the range.

Caitlyn sort of get free harrass early game due to her range, escape via net, and traps.

Corki's true damage is based on what he buys and early game it is rather moot as lvl 1 to 6 (unless fed or bought multiple dorin blades) might not do more than 10 true damage per hit and the true damage doesn't scale with crit, which every adc gets or just about every adc gets. He can disenage and chase but it comes with a long cooldown.

Vayne can disenage with E and possibly stun, chase wit passive, AD steroid on Q and R, really spamable Q, true damage is based on enemy's percent HP = tank killer and still eat chunks from squishies, scales really amazingly into lategame.

Ezreal attack speed buff on passive, attack speed buff for allies on W, Q applies on hit and reduce cd by 1(auto attack + Q w/ lifesteal = 2x heal in a split second), E is an escape and chase. Remember Mystic shot's max range is 1100 and his auto is 550. In a sense that even if he is doing not so good he can still try to farm from afar.

Tris has reset for W, attack speed steroid on Q, range increases from 550 to 803, her E scales with range, chase/disenage with W, R is damage and disenage.

Twitch has the lowest stats of all the adc for people with his attack range I believe( aka I did not do the math and check them out), and his true damage is good early if you or the support has ignite but it requires you to keep getting the stacks which means that you have to pick someone with sufficient cc.

Thought it really boils down to what you can play and what your team needs.

Personally, My favorite adc are

Ashe- Utility and queen of kiting. Sivir- I saved myself and others with it so many times but her range is like 525. Graves- I use my jungle masteries and go 9/21/0 and aim for out trading the enemy adc. Kennen- manaless adc with a stun scales quite well though but keep in mind that you can't auto attack while using E but pretty good for repositioning.