Gina's Pilot size 47 (similar slope on tube)

The virtual is 47 (the longer dimension) and the actual is 46 (shorter dimension).

With the difference in size frame dimensions you posted, may change the ratio of the difference in dimensions. As well as maybe a slightly different geometry.

But usually the virtual is the actual distance ina straight line. 58 cm bikes usually havea 58 top tube length.

As her 47 has a 47 virtual toptube length.