A lot of factors will determine the payment rate of these two forms of ads. The first will be the platform they are using, their targeted audience and the performance of their ads. Generally, while interstitial ads has higher CPM than native ads, it doesn't pay more than it, because of its intrusiveness on users' experience.
Invariably, one may conclude that there is tendency that native ads will pay more if it is used to focus on heavy-content platforms, while interstitial focuses and do better on apps and games.
Invariably, one may conclude that there is tendency that native ads will pay more if it is used to focus on heavy-content platforms, while interstitial focuses and do better on apps and games.