OVERALL: Draw

The US/Canadian releases have lossless stereo audio and isolated music tracks, though note the aspect ratio is cropped from the original 1.33:1 broadcast ratio to 1.78:1.
The French release has some exclusive extras and has the episodes in the original 1.33:1 broadcast ratio, but has lossy mono audio.
The UK has the last 3 episodes in their original 1.33:1 broadcast ratio with lossless audio, but no extras.

CUTS:

• Blu-ray A The Return America- Kino Lorber - No cuts.
• Blu-ray A The Return Canada- Kino Lorber - No cuts.
• Blu-ray B L'intégrale de la série en haute définition France- L'atelier d'images - No cuts.
• Blu-ray B Columbo: The Final Years United Kingdom- Fabulous Films - No cuts.

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Comparison added by Matthew_B_Harrah on 25/07/24
Comparison last updated by Anthony_DiPaola on 11/12/24

UPDATE LOG:

25/07/24 - Initial entry.
14/09/24: Added US, Canada.
11/12/24: Addition of the UK release.