No, they are different gauges with shared historical roots (5ft was the original Russian gauge, 1520 mm late Soviet redefinition). While the tolerance ranges fo

No, they are different gauges with shared historical roots (5ft was the original Russian gauge, 1520 mm late Soviet redefinition). While the tolerance ranges for the two gauges overlap, they're not identical, nor is either a superset of the other. Trains can be built to be interoperable, but are not guaranteed to. And either way, these countries are in Europe by any definition and not on standard gauge.