Small mistakes there and there which build up into a not so good cheat sheet.

* Q start is better as you can't take minion aggro with E early.
* W max is better than extra 30 dmg per level for E
* I'm missing the mastery Frenzy, unyielding and juggernaut from masteries.
* Last whisper > BC always. I wouldn't even recommend a BC.
* I don't get your builds that rush tons of attack speed without base AD
--> Attack speed works much better the more base AD you have to go with it.

Botrk + Youmuu's and Infinity Edge + Statikk shiv are both stronger starters.

* It's not a great idea to sell boots to lose all the mobility you need to fight bruisers.

@Blue: Caitlyn is a hard lane. No Caitlyn will let Quinn get into Vault range.
Even if that's the case, simple E + Q already wins the trade in favor of Caitlyn.
Quinn should lose the match up quite clearly.

Read through your guides, I could find several errors in spelling and grammar here.

As a Quinn player too: How would you define Quinn's purpose in a game? Would you orient her towards a split-pusher or a normal ADC?

Apart from that, I do not agree with two things in your guide.
Firstly, I am used to adding points into Heightened Senses early game instead of Blinding Assault, and I also max Valor first. I tend to separate from my team and pick off stray enemy players, in which the bonus Attack Speed from Heightened Senses grants me immense duelling power. Blinding Assault to me is simply a Utility spell and has not that much purpose.

Secondly, I do not agree on your claim that Caitlyn wins Quinn in lane. A simple Q > Proc Passive > E > Proc Passive combo can take out a large chunk of her health, and combined with a support you can easily win her if you go aggressive. You out trade her under normal circumstances, unless your support is really bad or your enemy has a highly superior support. There is no reason for you to lose to a Caitlyn in lane, just man up and go ham on her. Your mobility too wins her easily, just pop your Tag Team and hit her, Caitlyn pretty much can't escape from you. On this note, a suggestion is to add a synergy section for Quinn.

Overall, great work. Also, on an unrelated topic, your artworks are pretty awesome. Keep it up! :)