if you want a random mod source then both marbles andpeaks will give you that with a bunch of pros and cons:
peaks
pro: small footprint, a vast colkection of LFO shapes, incl. random ones. the shapes can be morphed (eg. random can go from steppy to smooth), also works as an EG and various other things
con: if you want two independent channels you need to use expert or dual mode, which are a bit harder to use or limited in functionality. Limited control over the random shape, you basically just control the frequency and how smooth it is.
marbles
pro: it’s a random workhorse, with several layers of control over the 4 outputs (looping/repetition), spread, bias, etc. it also produces gates/clock. Hence it’s much more performance/jamming oriented. Built-in quantizer for pitched sequences.
con: bigger than peaks, if you just want a sawtooth or sine LFO it won’t let you do that.