Smart chicks are not easier or harder, they are just different.
The principles of getting them are the same as what you would do for normal or dumb chicks. You still be the man, c0cky and playful, tease and have fun.
However, be careful with the c0cky and playful. Because they are "smarter", they will have comebacks. I have found that this is not their way of shooting you down, but a sh!t test. She is thinking - ok, this guy SEEMS witty and intelligent and funny, let's see if this is his stock line, or is he GENUINELY witty and funny. So very important that you develop your wit and be able to fire away comebacks QUICKLY.
Also you will find that when you are confident and genuinely act like the man with the smarter chicks, they will TEST you harder than the dumber ones. They want to know that you can hold your own against their "pressure". They want to know that you are the genuine deal and not just putting on a front. They will say crap like "Don't be an a$$hole" etc. You have to demonstrate that you do not take SH!T from her, and you are able to find "flaws" within her that you can make fun of.
Because they perceived themselves as being smarter, they want the best of the best (in terms of men). Most guys are scared of them, or hold them in awe due to their mental abilities. But if you treat them as normal and NOT TAKE THEIR SH!T, they will love you for it.
I am a lawyer, and there are a lot of law chicks that do the EXACT same thing to me. I will shoot off a comment or two, but they will have comebacks for. But when I continue and beat their comebacks, they can do nothing but laugh. After that IOIs are given out like candy.
I find that chick lawyers, or chicks who are studying law loves to argue. They will argue and argue about anything. You can point to a car that's red, and she will try and argue that it is blue. It is f ucked up. I guess it is just them being insecure and need to prove to you that they have a brain. Sometimes you will find that with other smart chicks.
Smart girls are looking for someone who they can talk to. They want the more intelligent types of guys who are witty and fun. They usually have contacts with the smarter guys who study too hard, and take life too seriously (read BORING).