Yes, this is an important distinction.
It should also be noted that this is not an apples-to-apples distinction:
* How many moderator _hours_ are being used? This is going to be largely homogenous between the major platforms, it is not homogenous for the fediverse.
* How many moderators are _paid_? This is going to be largely homogenous between major platforms, it is not homogenous for the fediverse
* How much _duplication of effort_ is there?
etc.