A first few impressions on the Aftershock:
I had to get past some initial disappointment. I assumed the Aftershock would have the same firepower my C4 has, but for that, it seems, I should have gotten an Ultrawave. It looks like the C4, it feels like the C4, but the buttons do not work as expected. I still have to wrap my mind around how the presets work. When you step on the foot switch and hold it, it changes from green LED to red LED and gives you access to the other 3 presets, but it's also in "Soundblox" mode, whatever that means.
However, I dug through the presets available on the Neuro app for my laptop - and I found there are less than for the C4. Not wanting to dive deep into the whole thing yet (and also lacking the time for it), I did toy around with some presets. I found a Green Rhino, a quite credible SVT, and two different Doom2 versions, so there's something to compare with the real world counterparts. I have no SVT at home, but I've played that amp and a ton of pedals and preamps that copied that sound, so I go by ear and memory on that front, while I can compare the Green Rhino and Doom2 presets to the original flavor.
And here's where that leads to a problem: You obviously cannot set up the Aftershock to completely emulate every single nuance of those pedals and those patches are user created. I assume the users either used the original pedal in their favorite settings or they copied the sound of a bass they knew was using that particular effect. However, when you're loading in the Doom2 patch, you don't get a Doom2 pedal with all its functions, but you get something that could be called a snapshot of a Doom2 in one particular setting - and when you start to twist the knobs, you move away from that. Comparing the Doom2 patches with the Doom2, one thing became instantly apparent: I personally use the Doom2, because my playing dynamics leave the pedal intact, and I can use that to trigger the envelope, much like the Meatball or the Brown Dog and Agent 00Funk combinations can do. This (obviously?) does not work with the Aftershock. The envelope opens the same amount, no matter how hard I hit the strings. Also, there is some weird artifact in the sound when you let a note ring out completely. I thought this has to do with the noisegate, but when switching that off, some of it remains. You probably need good headphones to make it out - and it won't happen too often that you let a note decay for that long, but it's there.
The Green Rhino was completely off. I could not really bring the patch and the original pedal sound alike.