I've seen some breakdowns, and (depending on the content, because different ad segments can be more or less lucrative) view time from Premium users tends to be worth more, and often way more.

As I understand it, a chunk of your membership fee is divided amongst all monetized creators you watch on a monthly basis, proportional to your watch time. A different chunk of your membership fee is divided between the creators and record labels, for your watch/listen time of Shorts and Youtube Music.

So the size of the creator is only relevant insofar as it can determine whether the channel is eligible for monetization. View time is not worth a different amount depending on the size of the creator.