I really, really would never want to have to choose between the two. I love the low-downforce-yet-flowing Spa. It’s probably the most flowing of all the F1 tracks. If you looked at overhead shots; the cars look like they’re gliding smoothly through the corners. If you looked for example at somewhere like Silverstone or Suzuka the cornering looks more intense rather than flowing.
From a driving perspective Suzuka edges Spa slightly because of the driver-defining layout