For spicing up a synth both are good, but Habit is probably the one if you want new accompanying sequences.
Mood is more like… it’ll snatch up a tiny micro loop (from a few hundred milliseconds to a couple of seconds). You can then “play” that micro loop by repitching it in stepped fifths and octaves with the clock knob (which also changes the sample rate, sounds v good) and sending it through delay, reverb or “slip” (a kind of delay where an audio buffer is played back at a speed set by a knob). You kinda bounce audio between the loop side and the effect side, it’s a very interesting design. You can make it more playable if you MIDI map a pad/key controller to the clock intervals - then you can play or sequence more interesting melodies than you can get from sweeping the knob. But what it’s not gonna do is generate some new sequences out of what you’re playing - the pedal itself needs to be played like an instrument to get the most out of it. It is very special in any case.
Habit you get a bit closer to generating compatible sequences, cos you’ll get snippets of your past playing from the last three minutes peeking back in. If these are also effected by the modifiers, you get something ‘new’ but related/familiar.
You might want to look into the Microcosm as well, which has a few modes (Seq, Arp, Blocks, Interrupt) which are quite close to the spice up synth/generate complimentary sequences thing you’d like. The biggest downside to it (imo) is that for each effect you basically just have two mysterious macro controls so you’re not really able to get very precise with what it does - it just does its Microcosm thing. Don’t get me wrong, it sounds lush, but YMMV depending how much fine control you like on your effects/sound design.
Edit:
Actually, yeah, that’s probably the thing that’s gonna definitely get you where you want, lots of prep required though.