The presence of a vertical visibility observation would indicate an obscuration, and the lack of a ceiling. But ceiling isn't controlling, so the RVR would still be the critical factor. While vertical visibility is an estimate based on looking up into nothing, RVR is a measure of seeing conditions with respect to all of the visual aids, particularly runway lighting. Quote from the FAA Air Carrier Inspector's Handbook:
RVR is an instrumentally-derived value that reflects an artificially created seeing condition on or near the portion of the runway associated with the RVR report. This artificially created seeing-condition is achieved by using high intensity runway edge, TDZ, and centerline lights.