I don't think it's possible to tell at this point.
If you looked at the operation of a digital computer, you'd find an analog substrate, with some quite interesting properties. Deciding whether the analog substrate is an important semantic element of how the computer worked, or whether its operation should be understand digitally, is as much a (research-driving) leap of faith as anything else.
That's actually a pretty convincing point. If all we were able to understand was the flow of electrons in a transistor and not how they were connected, we wouldn't necessarily be able to conclusively claim that digital computers were indeed digital.
If you looked at the operation of a digital computer, you'd find an analog substrate, with some quite interesting properties. Deciding whether the analog substrate is an important semantic element of how the computer worked, or whether its operation should be understand digitally, is as much a (research-driving) leap of faith as anything else.