> They're low cost, they're hardware, but almost all of them fall short of the originals.

As with everything Behringer, a lot of this varies from product to product. And it also depends which axes you measure along and which you consider important.

Like, for example, I don’t think anyone who’d done their research could seriously suggest the TD-3 and its variants aren’t as good as an original 303. In some ways they’re better: MIDI support, for example, and the MO - which is the second one I bought - implements the Devilfish mods that were popular on original units. But sound-wise, they’re as similar to a real 303 as the tonal differences between two original 303s. And hardware wise, well they’re cheap plastic boxes just like the originals so Behringer have certainly nailed the feel of using a 303.

On the other hand, something like the Poly D, does have some differences to the Minimoog. Again, it has some stuff that the OG doesn’t: an additional oscillator, paraphony, MIDI, a sequencer and arpeggiator.

Soundwise it’s very close but my sense is the filter doesn’t have quite the same hollow but fat character of the Moog filters I’m most familiar with (Moog One so not directly compatible). But it’s close and I’m not sure in a mix anyone would notice you were using a Poly D rather than a Minimoog.

And then you can find areas where corners have been cut: knobs and switchgear of the Poly D are solid and satisfying to use, but the keyboard is absolutely meh. It’s functional but it feels (and is) cheap. Not a patch on the OG.