Unfortunately I don’t have any FlyingIron aircraft yet. I’m waiting for the FW190. From all I hear their warbirds are superb. The Blackbird one is very solid, and if you like the real life Corsair then you will likely like theirs. The main complaint I have is that the nose rounding is a bit low poly which is a bummer considering how conspicuous it is.
For a clearer answer on how they compare I hope someone who owns both the Corsair and some FI planes can weigh in here.
You owe it to yourself to get the Spitfire. It truly is a Must-Have!
One Hundred Percent 
Yeah I know. It’s rather silly that I don’t have the Spit yet. For one reason or another I always put it off. Should really stop delaying myself, shouldn’t I?
In a word, yes 
Two more planes to report on, no surprises there considering they are LL/FF:
Carenado Staggerwing: engine damage not modeled
ATSim AN-2: engine damage not modeled (still love this bird to bits though)
So, final report on engine damage. With these I’ve now tried out all of the radials and rotaries in my hangar:
Redwing Farman F60 Goliath: partial engine damage. You can mess it up, but not due to overheating. I sat on the tarmac at 35 C temperature with engines running full pelt for fifteen minutes and nothing happened. But the plane models a few other things, such as visible damage to the wings when overspeeding.
Junkers F13 Replica: no engine damage, no surprises there.