My son can't decide between Navy or AF, but he has a goal of being in special forces. What advice would you give him?

I would ask whta does he want or think he will be doing as a PJ?
PJ's are a SOF asset that conduct SAR personnel rescue and recovery, not a DA (Dirct Action on contact Force).
If he wishes to do DA stuff and in the Airforce in needs to look into TACP, as they work Directly with ODA teams and other SOF elements that can and do Direct action missions.

You also have SOWT (Special Operations Weather Technician) this are Special weather operators assigned to ODA teams to support them in combat and team operations. I had the pleasure to meet and work with several on my SOF deployment in Afghanistan, and one ODA team the SOWT on the team was the acting JTAC and was one of the two team Snipers/overwatch.

The other is CCT's (Combat Control Teams) they work directly with Army and Navy SOF elements to provide command and control and direct air traffic in remote, and often hostile,areas.

He needs to decide what type of work he wan'ts to do not just be a SOF guy, to be elite.

Navy has several options
SEAL no explanation on that, training is long and hard.

Navy also has EOD, and they are Special operations capable and support and work directly with all military SOF units. They are a direct action combat unit.

Then you have Navy AIRR Navy Aviation Rescue Swimmers. They do water SAR like PJ's, definitely not going to do any Direct Action stuff at all.

You have SWCC but I leave that there they are boat guy's that conduct insertion and extraction of SEAL's into areas, They are not Direct action but are combat support, meaning they stay on small boats

Something you should consider is what about joining a reserve unit that can do most of the same thing.

I know guys who join infantry units in the AC or the ARNG
going who Ranger school or like my old unit ,Civil Affairs here in Southern California, that's Airborne qualified that allowed you to go to Airborne, air assault and even Ranger school if you were one of the better soldiers.

I was in Civil Affairs units this is a unit that is related to Special Operations( SO) that's why many of them are airborne qualified and they get deployed every other year and they work side-by-side with special forces.

I knew of a Civil Affairs staff sergeant who worked under me he became soldier of the Year, soldier of the Civil Affairs command he got his wish to go to Ranger school. he passed that that then he applied for Rotary Wing Aviation school and now he's a Warrant officer flying blackhawks but his civilian job is being in LA county Sheriff's Deputy!

There are lots of opportunities in the reserve component in case your son wants to go to school and earn a degree and once he gets his degree ,he can be a commissioned officer if he wants. I joined at age 31 and I became an officer almost at 34 years of age in the ARNG. This may not apply to your Son but I'm showing you that there are also lots of opportunities in the National Guard and Army Reserve and they're even in Special Forces Army National Guard detachments all over the USA. Just want to give you my opinion. hopefully Rallypoint will help you and your Son make the best decision.

needs to bring that score up, even though need to look at spec ops vs special forces it all depends on what he is interested in, army spec ops include ca, psyops, rangers, sf, airborne, from experience navy seals are the toughest, followed by sf and rangers, physical shape doesn't cut it mental endurance does, just my thoughts