Hey Beezy, I got a cousin who was 1st infantry marines, I asked him about the force recon... Basically this was his exact response..
"when the president wants something done that's achievable and quiet, then he calls the seals."
"when there's some chaotic shit going down and he needs something done that might not be achievable and not worried about keeping quiet then he send force recon".
He also said that the big difference is that when a force recon team is sent out, everyone involved knows that there is a good chance if not guarantee that they ain't comin back!