The DSP presets are in the form of Convolution filters (Impulse response), so it cannot be shown in a parametric EQ form. The FIR form gives us precise control over both phase and frequency response and we can also guarantee the same behavior on multiple platforms.
Regarding distortion, applying DSP can lead to clipping at times, there is even a thread about it here, the best way to deal with this is to add headroom. Start with -3dB. XC are very efficient so you will not loose much of the headroom of your amp if you reduce the gain on the DSP.
If distortion is the only factor keeping you from using the preset, I am fairly confident that changing the headroom would work. The drivers themselves are very low distortion and respond linearly to any cahnges introduced by the presets.