Of cause, I assume it's difficult to compare 50% of paid subscriptions to 55% of ad revenue. I have heard that YouTubers earn per view from premium subscribers than from ad supported views.

percentages are meaningless in the ad space and I think topic specific CPM would be a more meaningful comparison. Even on youtube itself things like kids toy videos can make 4x or more per 1M views when compared to a Political show or something technical.