Mismatch between 2p2c and 2pnc

I checked whether the 2p2c and 2pnc formulation produce the same results for a 2c system. This is not the case. The mismatch is quite significant, see the values below. Maybe I did something wrong, but I fear they do different things, see e.g. #370 (closed) and branch 'fix/assimilation-of-2p2c-2pnc'

Data differs in parameter: Sn Difference is too large: 60.04% -> between: 0.000251348 and 0.000629042 Info for Sn: max_abs_parameter_value=0.185001 and min_abs_parameter_value=0.0.

Data differs in parameter: X_n^H2O Difference is too large: 19.41% -> between: 0.00600807 and 0.00745481 Info for X_n^H2O: max_abs_parameter_value=0.0133691 and min_abs_parameter_value=0.000473928.

Data differs in parameter: rhoN Difference is too large: 4.60% -> between: 72.2149 and 75.6937 Info for rhoN: max_abs_parameter_value=107.177 and min_abs_parameter_value=54.9932.

Data differs in parameter: temperature Difference is too large: 1.61% -> between: 370.613 and 376.667 Info for temperature: max_abs_parameter_value=380.006 and min_abs_parameter_value=311.8.