The turbine releases video is even a huge upgrade its sharper brighter and black levels and the colors are better.
I haven’t got the US set to compare to but if the evidence is to be believed it is a good upgrade. I was given a couple of stills from the Turbine set for the episode Give Me Liberty… Or Give Me Death. I’ve corrected the Colorspace issue on the UK set and compared the screenshots. They are almost identical. Certainly the colour is indistinguishable from the Turbine set. The Turbine shot had marginally better detail / film grain. It just shows how frustrating it was that the Fabulous Films set had the colorspace issue as they were very good transfers.
I look at a comparison on YouTube and it’s night and day the mill creek release looked inbetween a upscale and this blu ray and not really in a good way the color’s actually pop on turbines release it’s amazing.