I'm rather hoping that the airdrop/para drop/air-to-air refuelling capabilities of the KC-390 exceed those of the A400M.
In the air-to-air refueling department, the KC-390 is very likely going to be better than the A400M. A400M's wake turbulence at helicopter speeds is excessive. That problem is reportedly being worked on, but France has already given up and committed to KC-130Js for their helo refueling needs.
As for airdrop and para drop, I'm pretty sure A400 is not yet cleared for either. I think those are part of the "tactical mission" upgrade that still lies in the A400's future. And those missions likely fall even farther in the future for the C-390. Time will tell.