iPad Mini or iPad regular for school/note taking; which one?

I want to buy an iPad for school. Money is not an issue. However, I don't know which one I should buy. It's primary use will be to take notes. The iPad would fit more notes, but I'm afraid that, if my arm brushes the screen while writing, stray marks will be made and that would be inconvenient. The Mini would solve this issue, but it would hold less notes. Any thoughts?

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