Everybody here is pretty much on the money.
Pathfinders are a part of Recce Platoon - not the other way around.
Just like the Para course, just finishing your Recce crse will not get you into the Recce Platoon. Only about 10% of guys get to go there, and not always the top 10% either. It's more of a "who you know" thing.
All of the Battallions have Recce platoons of excellent quality, just with slightly different areas of specialty. A recce patrolman from the first or second Bn can function just as well in the third and vice versa.
Recce is a pre - requisite to go on a sniper course - but once again, only a few snipers will be employed as such, and it is more of a who than what you know game.
Your best asset to go places in the Army is a positive attitude. No - one wants to employ or work with an arrogant complainer.