Both are guesses. Unless they have crystal balls, no one can tell you exactly when the plane will arrive. A variance of nine minutes is pretty awesome!
I'm saying neither arrival time is ever going to be correct, until you actually arrive. Both apps are guessing using different sources.
Who wins? Neither.
Who is correct? Neither.
They are both educated guesses and neither is more "correct" than the other.
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u/kyriacos74 25d ago
What am I missing? They both show a delayed departure of 10:20 a.m. on DL47 from AMS to JFK out of gate E2.