Scorer choice for charge collection from annular plates

Recording, Visualizing and Persisting Data
1

Hi, I was wondering which scorer you would recommend using for charge collected. I have annular plates that we fire electron beams of ~6 MeV through, and we have wires coming from the plates which give a reading of the current flowing away from the plates. For Geant4 I used:

G4PSCellCharge3D  *scorer_second_plate_cell_charge = new G4PSCellCharge3D(psName="Second_Plate_Charge");

and in EGSnrc I used a cavity region code which gives the charge in a region:

:start calculation geometry:
    geometry name  = full_simulation_geometry
    charge regions = second_plate
    cavity regions = second_plate 
    cavity mass    = 1 
:stop calculation geometry:

These have identical geometries in each code system, but my results seem to be way off with the Geant4 and identical with EGSnrc to my experiment. I was wondering whether perhaps the G4PSCellCharge3D was the wrong scorer to use and wondered if you had any advice as to which would be a better one for my application.