If it doesn't have linear long slender fingers,then it is not another strain,it is a misnamed cultivar.
Now of course there could be more than one kind of Ronde,as to the health of plant:
Healthy clean Ronde de Bordeaux,and Fig mosaic virus infected Ronde de Bordeaux.
Many people in France grow Ronde de Bordeaux,some in isolation,some in large orchards,so,yes there are healthy and non healthy specimen of the same cultivar.
There is only one cultivar but depending of health of tree and where it was grown ,there could be wide differences in adaptation,but not in leaf or fruit shape.
This is how a healthy Ronde de B should look:Pix
This I obtained from a source in eastern France at the Border with Germany,at 600m Altitude,alpine climate,where the fig wasp and Acaria fici ,that spread Fig mosaic virus can't live,trough the Winter.