Interesting question! The TR-8S is a drum machine and the OP-1 is a synth. On the TR8S you have limited options to alter the sound but on the other side the TR8S offers changes per Track/Inst. I could write an essay about this... Speaking about my video and the same sounds with 2x Tr8s is should be possible. I actually use the OP-1 only as a keyboard and change the low pass filter. So you can use the TR-8S like a keyboard and could use also the Master FX to ad filters.