A silver lining of the pandemic: asking for a video call (Zoom, Skype, whatever) is now part of the fabric of life. Perfectly reasonable to suggest a 15-30 minute "get to know you" call, adult beverage in hand and whatever virtual background you want. You'll quickly learn:
1. Who shows up
2. Whether the couple is on the same page
3. Whether the photos were ten years ago and 50# lighter
4. Whether they can hold a conversation
5. Whether you might be interested in meeting them in person
If the 'other couple' cannot find 15-30 min to meet you on a "Zoom call" , it's telling.
If after 15-30 min you decide to go your separate ways, it's a small investment.
If you decide to meet, at least you'll know what they look like when you get to the restaurant or bar or whatever.