Is the MiniFreak better for bass?

Both can do bass well, but the Minilogue XD's analog signal path gives it a slight edge in low-end weight and punch — the analog filter self-oscillates in a way that digital engines can't fully replicate. The MiniFreak can produce interesting bass textures, especially through its wavetable and FM modes, but it skews brighter.

Can the Minilogue XD save patches?

Yes, it has 500 program slots organized in a 4×5 grid pattern. Unlike the MicroFreak or MiniFreak, you can also load community-made patches via MIDI sysex, which gives you access to an active library of user presets online.

Does MiniFreak have a vocoder?

Yes — the MiniFreak includes a vocoder mode that requires a microphone input (a basic condenser mic works fine). It is not the deepest vocoder available, but for a synth at this price, it's a genuinely useful addition for vocal textures and robotic effects that the Minilogue XD cannot do at all.