I've never used either of the Verbos oscillators (though I would be very interested in trying out the Harmonic Oscillator someday), but I do think the Verbos Complex Oscillator is very similar to the Make Noise DPO, as far as layout and features. I think you would be able to achieve a greater diversity of sound by keeping the HO paired with one CO, rather than having two COs. I don't think you would be gaining much more capability by adding a second CO, but that comes back to how you plan on using them in your system. If it were me, I would keep the HO and CO that you already have. However, if you are looking to swap out one of your oscillators, I would recommend the Frap Tools Brenso over the Verbos CO, as it is a very feature-rich CO. It is also slightly less expensive and smaller than the Verbos one. I replaced my DPO with a Brenso, and I am happy with it, but be aware that it has EXTREMELY high power requirement specs. It's given some of my power supplies problems in the past.