Actually there were a lot of differences; but, I just did a quick research and didn't see any Corsairs specifically designated Navy or Marines. But here's what I did find:
The corsairs were modified at least
2 dozen times from the '40's to the early 50's ... some specific to the needs of the two branches. The most obvious, of course, was the tail hook for the Navy planes used. But there were a lot of other mod's for the two branches:
- cockpit seats in the Navy planes were elevated 8-10 inches up so pilots could see the flight deck as they approached.
- also, the Navy version needed specific kind of shocks to keep the planes from bouncing after they landed on a flight deck.
- Marine versions carried different ammunition and had a added steel plate around the gas tank
- several hp & engine modifications to enable the aircrafts, most used in engaging enemy aircraft, to reach much higher altitudes to gain fighter advantages
- there were both folding & fixed wing versions used; Marines mostly used the fixed winged type
There were many more modifications, but those above stood out in my read. I was surprised to find that they were still making the planes into the early 1950's; guess that's why there are more of them than P-38s, and other WW2 fighters. I look at the 1940's as the grand age of the "fighter aircraft" the same way as I look at the 1960's as the grand age of the muscle cars. I could spend months reading about the different fighter aircrafts.