From my experiences this year I can honestly say that no it does not matter. NROTC asks you whether you are applying to other branches but arotc and afrotc do not. That being said I did marine, arotc, and afrotc and only the arotc interviewer brought it up and when i think as long as you give a valid reason then it is not a big deal at all. I say go for it, why not give yourself as many opportunities as possible