Final word, if you want 4 or even 6 voices that sound the same, get yourself a nice polyphonic synth, a modular is a wall of often very distinct and different sounding signal paths.
-- GunnarWaage

This!

Take a look a HydraSynth - very modular in it's philosophy with it's delightful and very comprehensive patch matrix and 8 voices, 3 osc per voice, plus mods, various flavours of noise, 5 LFO, 5 Envelopes... very digital and excels at glass/FM/etc., and while it is definitely not - it can sound very dirty and analogue and squelchy too, oh and built in effects that sound great... and true polyphonic aftertouch - per note!