Use the same towgs84 value (not a rounded one)
Use the same towgs84 value (not a rounded one)

http://spatialreference.org/ref/epsg/2056/proj4/
http://spatialreference.org/ref/epsg/21781/proj4/

camptocamp/ngeo,adube/ngeo,pgiraud/ngeo,ger-benjamin/ngeo,Jenselme/ngeo,kalbermattenm/ngeo,pgiraud/ngeo,camptocamp/ngeo,camptocamp/ngeo,kalbermattenm/ngeo,ger-benjamin/ngeo,adube/ngeo,camptocamp/ngeo,Jenselme/ngeo,camptocamp/ngeo,kalbermattenm/ngeo,pgiraud/ngeo,ger-benjamin/ngeo,Jenselme/ngeo,adube/ngeo,adube/ngeo,Jenselme/ngeo