Yes, with the caveat that if you fly a lot in UA Y, BD doesn't get you E+.
If you fly C or F however, it's even better on BD - 200%/300% COS (on RDM and EQM) rather than 125% on RDM and 150% on EQM. And once over 55K, the EQM is added to the RDM so you get 400%/600% RDM.
And then there's the "miles and money" awards.
Yep, there's a few reasons I switched.