Since the days of the original Axe-Fx I've been obsessed with the aliasing performance of modelers as I think this is one of the things that separates the good from the not-so-good. I believe that a target goal for a "high-gain" amp should be a minimum of 60 dB of what I call "Signal-to-Peak-Aliasing". Analog amps don't alias so any aliasing above the threshold of audibility (60 dB) reduces clarity and definition. Aliasing is particularly nasty because it's harmonically unrelated to, and can occur at frequencies well away from, the desired frequencies (and, hence, is not masked by our perceptual process).
The high performance of the Axe-Fx III CPU allows aliasing performance to easily exceed that. Below is a graph of the aliasing performance of the III vs. a popular competitor's product. III in blue (obviously).
The high performance of the Axe-Fx III CPU allows aliasing performance to easily exceed that. Below is a graph of the aliasing performance of the III vs. a popular competitor's product. III in blue (obviously).