Army Special Forces vs. Navy SEALs vs. Marine Force Recon. What exactly do each do? Which is "better"? - force recon vs pj

I'm trying to decide which store to pick up on the basis of the special forces, because that is what I do. I must also take into account that I fail and what would be my backup. For this reason, it includes poems. Army has been thought, but I do not hear very well treated, and that the Marines more or less done. I thought Delta army, but could be a realistic goal. Someone help me please.