The front end of the digital fuzz pedal does not see a load of the pickup - it does not do the same trick like you would expect from the real pedal.
I'll preface my Rey by admitting I am neither an electronics expert or a fuzz afficionado so I could be totally wrong.
I don't think that is the case. From what I understand it is the less than 10kinput impedance of the pedal that loads down the guitar signal. Therefore, it shouldn't matter what the digital fuzz sees as long as the input impedance of the device can be set to around 10k. I believe the actual fuzz face circuit shows the guitar between 5.4k and 8.2k depending of settings.