I think the difference he implied was where airborne A2 was with respect to the plane of the division line at the time he caught the pass from A1. In the first case, he was over the backcourt side, and in the second case he was over the frontcourt side.
This difference is, of course, irrelevant. The location of A2 is the same as when he was last in contact with the court, i.e. he is located in the backcourt in both cases. Therefore, backcourt violation in both cases.
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