LP made from a digital master recording...

When an LP is pressed using a digital master recording as the source, does that LP still have an analog advantage?

It sure seems that way. What makes it hard to say for certain is the problem of how to compare. Because what you're asking really boils down to which is better the LP or the CD. And while we all know the answer, the CD guys can't handle the truth, and will deny to the point of death, till you pry the remote from their cold dead hand. 

My theory is this - if a digital recording is available in high res and you have a good DAC then the digital is preferable.

If it’s an analog recording and the LP was pressed in a purely analog manner (some lathes digitize the signal to do groove spacing) and you have an excellent Analog rig then that is preferable.

if no hi res is available, chances are the LP was cut from a 24 bit digital file and may sound better than a 44.1/16 download or CD or rip.

There are some who feel the LP compression pre conditions the signal and has sonic benefits regardless of digital or analog source.

It’s essentially a crap shoot and can vary by mastering and  release, and of course your system may be better at one vs the other source.

I sometimes buy cds and vinyl of the same album. It's often pretty close if the cd is not too compressed. Although I am a vinyl guy, I agree that it's not worth the effort if the sound is virtually indistinguishable from the cd. But sometimes, the LP is not as compressed as the cd or mastered differently ----and then there is a big difference. The only problem is knowing in advance whether you are wasting your money.