Feeling Lazy......Do I edit my personal statement?

Okay so I want to apply for Astrophysics and I've just mentioned reading books for physics and astrophysics but I also applied for one geophysics course so do I have to mention something geo-related?

How much overlap is there between the courses?

Somewhat of an overlap because I have to study a planetary module for both Astrophysics and Geophysics. Difference is that geo will focus more on Earth while Astro will focus on other planets as well and I suppose any other difference will be due to how the uni course is set up.
I'm trying to broaden my course choices in order to make sure I get an offer to uni.