Currently, I am applying for several Ph.D. positions. I have seen two interesting positions from the same group/professor. The requirements for both positions are really similar but the topics are different (but same field). Since there are not that many positions within my field, I considered applying for both positions, but I wonder what the professor might think? The documents (CV, cover letter ...) would be the same and he might think I just copy & paste my applications.
Should I contact him before? What could I say?