I dunno. Nobody is studying what happens if you take more than one vaccine. Would you be willing to potentially lock yourself out of the 90%+ effective vaccine forever in order to get the 60% effective one six months earlier? Not an easy call to make, imo.
So, grimly dark here that we may get a vaccine quicker because of how bad things have gotten. But trying to read through the lines of this press release, and it seems like there's an indication of sterilizing immunity. That would be huge. That means not only that you don't personally get sick, but also that you don't get an infection in the first place and become an asymptomatic or mildly symptomatic spreader.
Need to wait for detailed results to really understand this. Hopefully by Thanksgiving.