What's the reason for stopping at both; aren't they a relatively short walk apart anyway?
There is a service this evening from Man Airport to York, via Piccadilly and Victoria. I didn't know trains were running between the two stations yet?
One other alternative. Picc to Ordsall Lane Jn, start of the Chat Moss line, then reverse there and over the viaduct to Vic. Used it a few times on nights 1P01 or 03 when Salford Crescent is unavailable.
Have you ever been to Manchester?
Picc to Vic can be walked by a fit adult unencumbered by luggage in a little under 15 minutes (I've done it plenty of times). The other way is a little slower because of the difference in elevations. But at times when any connecting bus service is not operating it is likely to be rather intimidating to strangers. Try navigating around any unfamiliar city-centre after dark. Oh and it rains rather regularly in Manchester.
It is a fairly straightforward walk once you've done it once, but it would be a lot simpler if TfGM just allowed free Metrolink transfers on NR journeys involving Piccadilly and Victoria.