Colour System

One of the reviews says:
"the similar colour technique which is surprising given this is Eastman and "I start" is De Luxe.."

There is a great deal of confusion about colour credits.

The following is a simplification but would apply to well over 90% of films.

Since the 1950s the vast majority of films have been shot in processes which are essentially very similar.

Eastman (Kodak), Fuji and Agfa (now discontinued) each produced a range of film stocks which had slight differences (colour bias/contrast/sensitivity etc) but the differences would be unnoticed by the layperson and could be largely overcome depending on how the film was shot (lighting, the use of filters etc.) A professional might struggle to tell the difference if they didn't know the circumstances of the shoot.

The Soviet Union had it's own stocks but they were based on the same original Agfa technology as all the others.

The film would be processed in any one of hundreds of laboratories across the world using exactly the same techniques and chemicals. Some laboratories would simply have a credit like "Rank Film Labs" others would insist on credits like "Color by Deluxe" or "Metrocolor" which might suggest that they were doing something different to the other laboratories - they weren't. There is no reason that, say, Eastman stock processed by Deluxe would look any different to the same material processed by the unknown lab down the road or on a different continent.

Technicolor is slightly different in that they had previously operated a different shooting and printing system, the culmination of which was 3-strip Technicolor. This ceased to be used after the early 1950s and Technicolor, for the most part was a normal lab like all the others, only occasionally using the post production part of the 3-strip process to produce a handful of prints for important screenings of expensive films.

In the vast majority of cases after 1950 the credit "Technicolor" means no more than "processed in the same way as every other lab by a company called Technicolor".

Hope this clears things up a bit.