Well, I can only speak for the varieties we grow.
Climbing french beans Cobra, Fasold, Rustico, Neckar Queen and Eva do not grow as tall or as vigorously (in our garden) as the runner varieties Red Rum, Desiree, Fergie, Lady Di or White Lady.
Based on the varieties we grow, runners are far more vigorous than the climbing french.
We get wonderful crops of both, so what the hell!!
valmarg