The Photrio forum thread confirms that the new Kodak-branded color negative films—such as "Kodacolor 100"—are not the same formulations as the original 1980s versions, despite sharing similar names.
Here’s a summary of the key points discussed in the thread:

New vs. Old Kodacolor Films
• Branding vs. Formulation: Several users clarify that the new "Kodacolor 100" and similar films are not reissues of the original 1980s emulsions. Instead, they are new Kodak-branded films produced by Eastman Kodak, likely using modern Vision3 motion picture film technology that has been repackaged for still photography.
• Differences in Look and Behavior:
• The original Kodacolor films from the 1980s had a distinct color palette and grain structure, optimized for consumer use and C-41 processing.
• The new versions are believed to be aesthetic reinterpretations or repackaged motion picture stocks, possibly similar to Kodak Vision3 250D or 200T, but with a Remjet layer removed for C-41 compatibility.
• User Observations:
• Some photographers who tested the new films noted differences in contrast, color rendering, and grain compared to vintage Kodacolor.
• There’s speculation that the naming is more about marketing nostalgia than technical continuity.

Manufacturer Details
• The films are being sold under the Kodak brand by Eastman Kodak, not Kodak Alaris (which handles consumer film distribution). This distinction is important because it suggests a different production and distribution pipeline, possibly targeting niche or boutique markets.
• Some users express concern or confusion over the lack of official technical data sheets, which makes it harder to compare the new films to their historical counterparts.

Processing Considerations
• The new films are C-41 process compatible, but users advise caution, as some labs may be unfamiliar with these newer Kodak-branded films or may confuse them with older stocks.