Also, Demar played a lot more with AB than Fields did. He also played during the worst stretch of the season while Fields was injured. Simply using these two stats in a vacuum does not tell the whole story. I'm not saying that you're wrong but I would need something significantly more in depth than that (using situational data, video based analytical data, etc) to come to any conclusion.
For instance, for all of his poor individual stats the defensive ranking of the starting lineup was extremely high. That could be for a number of reasons. One could argue that it proves that the wing spots work well together guarding players. But again, that stat doesn't tell the whole story. I want to know the whole story. To me that includes finding out what a healthy Landry Fields looks like on the court.
Raptors should not trade Demar and start Landry because "theNBAGeek.com and net OffRtg/DefRtg through stats.nba.com" say it's a good idea. Point finale. I just find that ridiculous. Lets see how Landry does next season before this is even brought up again.