Today's op-ed compares the AJ1 Retro High Obsidian UNC (555088-140).

Exterior - as shown above, the real shoe has uniform, evenly spaced stitches that do not refract light. The replica shoe uses a different type of thread, hence giving off a shinier look. These inconsistencies are most evident on the Swoosh. 

The real insole uses synthetic EVA, while the replica uses a lesser quality non-woven fabric. 

Back of insole - the signature teeth marks are located near the big toe, whereas the replica's teeth marks are on the other side. The glue pattern should be clear and transparent, and in this case the replica, presumably to lower costs, did not use glue on the back of the insole. 

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