As I understand it, the difference between that and the pedal above, is that “patches” on the line6 are describing a chain of pre-existing effects. So like, phaser->delay->reverb. The polyend pedal you’re actually able to write custom dsp - so you’re able to build new units to chain together.

But there are other pedals that do custom code, rather than just custom patching, see my other comment https://news.ycombinator.com/item?id=46727231