Quick answer - YES - if you tag you posts with both #pob and #vyb you will earn both.

I might do a post about this soon, but in short, because everything I post on Hive is downvoted - posts and comments, I'm moving most of my voting power into VYB where there is no downvoting.

What I'm aiming for is:

Hive (total in all my accounts) = 100HP - I peaked at 250k three months ago, so this is a huge drop, but I've had a gutsful of the downvoting
POB = 10k staked
VYB = 120k+ staked - and this I'll let grow

So my votes in VYB will be by far the most valuable