Chalk and cheese ..especially in the right hands.
Resolve is a CC / Grade pro application beyond the scope of Premiere or Speed Grade ( as it is).
Benefits are many:
Secondaries, Power Masks, Mask Tracking, Keying, Nodal grading, stabilisation...on and on...
Try it for your self . Watch a video tutorial.
Its free but you do need the system to run it and time for a learning curve to use it.
Cons . Requires a profesional workflow as in DI and managing assets through a pro pipeline.