Assuming Eureka and 88's respective trailers accurately reflect the final grading, 88 did a pretty good job regrading the finished Fortune Star/Ritrovata 4K; good enough that I assumed they were the same transfer at first. If you look, though, you can see that they weren't able to mitigate everything about the original grade -- some nuances are a little flattened (look at Michelle Yeoh's face here):
[Show spoiler]https://forum.blu-ray.com/showpost.php?p=20180582&postcount=6
Eureka

88 Films
The lighting of this particular shot doesn't help matters, but given that Eureka restored the film from scratch using the raw 4K scans, I'm not surprised the results look a bit better, and I'm personally going with their release.