Branch for HPSP

I am very interested in doing military med and am currently planning on applying to med school this June. I would like to do something in spec ops as a physician(ie. JMAU/work as a doctor in the Ranger unit/SOST/FST),or would like to be a physician i n a branch with high op tempo. I know it’s a bit early to decide and I might likely change my mind in medical school but I wasn’t sure what other benchmark I would use to determine the branch of the military to choose. Can someone please give me advice? I spoke to both AF and Army recruiters and I was not sure which one is better for my preferences.