I literally came to ask a similar question as I have done a side by side comparison with the original 2011 Blu ray and the dremasters.
Granted I am watching the dremaster on my 1080p phone (not sure if the phone is automatically downscaling it from 4k to 1080p through the google photos app?) but I did definitely notice less grain in the dremaster compared to 2011 Blu ray remaster.
I have also played the file on my 1080p tv and noticed the same reduction in grain.
I understand the original notes for the dremaster say it will “cleanup” the grain but I would be curious to have the 1080p edition before the upscaling process to 4k. 🤷