How can I tell whether its the FS98 or CFS1 model?
By the prop disk. The CFS1 version has the default CFS-style prop.
PS. Will. I found the CFS1 version at Flightsim.com. I tried it in QC & it's the same as the other one. Don't waste your time on it.
Look round for a Corsair by another designer. One from the FS98 section would do. As long as it's animated or the prop will be stationary in AI. The important thing is that it looks right. You can give it a DP & a different AIR file if you wish.