For transforming from G5 Film to Extended Video the CST and the Camera Raw tab are identical, and the LUT is identical if applied in the Camera Raw tab or attached to a node.
There is a microscopic discrepancy between the LUT and the CST/CR tab. It looks like the midpoint is slightly higher for the LUT. What I'm seeing is more like a rounding error than anything else.
Fun Fact, the Camera Raw panel allows for at least four digits of input precision, yet is visually rounded to two. For example the midpoint of BMD film isn't .41 rather .409 so for Extended Video I though (naturally) it would be .384 but it's actually closer to .3835.
Good Luck

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