No, they are not.

@threespeak/how-to-reduce-hives-inflation-problem-our-new-dhf-proposal-voting-criteria-hbd-apr-and-a-proposed-value-plan-sop

Here you can see the inflation calculations for both DHF and HBD interest payments.

In order inflation would be

1. DHF Payments
2. Author/Curation Rewards
3. HBD Interest
4. Staking Rewards
5. Witness Rewards
6. DHF Fund (Inflation given to DHF Fund, not HBD paid by DHF)