i would say that the qtron+ is for experimentalists… fwiw, i traded my qtron for the qtron+ and haven’t been blown away. it certainly opens up new possibilities, but i generally dislike the sound of running your distortion into a filter so the fx loop isn’t necessary to me. i have, however, had fun putting a looper into the effects loop.

it wasn’t ‘useful’ fun, but it was fun.

lastly: sim tut’s right, they sound practically identical until you put something into that fx loop. the ‘slow’ setting on the qtron+ is only a TINY bit slower than the fast setting, i dont understand it.

you can’t really compare the riddle with the q-tron. q-tron is designed to sound like the mu-tron III and the riddle seems to be trying (and imo failing hard) to be like a meatball.
i really loved the big box q-tron but i sold it yesterday haha.

@ above – the effects loop lets you plug other effects into the circuitry of the q-tron so that you can affect just the sweep rather than having the effect after the whole pedal. if that makes sense.