DMX vs. XLR: What's the Difference?

One of the most enduring mysteries among working musicians is the difference between Mic Cables and DMX cables.  They look exactly the same.  They both use three pin XLR connectors, mostly.  A mic cable will send DMX signals and a DMX cable will send audio signals.  But, are they truly interchangeable?

XLR vs. DMX, What is the Difference?

XLR 5 Pin Female to Female Adapter Cable Dmx Ethernet Adapter for Stage

XLR vs DMX - Differences Explained

Accu-Cable AC3PPCON12 Combination 3-pin DMX & Locking Power Link Cable - 12 foot

XLR / DMX OFC Bulk Cable, 300 Feet

These are DMX Cables. DMX has a higher impedance (110 ohms) than XLR (75 ohms) 20 in long (0.5 meters) each DMX utilize 110-ohm signals for

MFL. 20 Inches 5 Pin DMX Cable to 3 Pin DMX Cable (3-Pin Male to 5-Pin Female) Signal XLR Male to Female Cable Wire for Stage Lighting Microphone

Accu-Cable AC5PM3PFM 3-pin DMX Female to 5-pin DMX Male Adapter Cable

XLR3 Male to Pigtail Adapter - DMX Adapter - 1m

XLR & DMX cables What's the Difference?