Your DAC is likely to have the least effect on sibilance of any component in your system unless it’s badly engineered. You’re more likely to hear a lot more difference between different speakers and different preamps than between different DACs, so long as the DAC is well-designed and doesn’t introduce a lot of jitter.
But in general, R2R DACs are considered to be somewhat darker and more euphonic than Delta Sigma DACs. This is only a generalization and some Delta Sigma DACs won’t sound hyper-detailed, revealing sibilance in the recording.