the synths seem to be able to play across the keyboard better, but make supersaw chord, pitch down to the depths of hell, overdrive with desk gain (to total and utter fuck, with maxxed out bass on the eq) then lowpass. this gives you a more chordey sub and you can do different chords on your super saw. check teebees remix of two sword technique for a good example of what this can sound like. not saying he did that, but i am saying thats the bass sound you can acheive using this technique. stick a sine under it if you need more bass. only problem with lowpassing overdriven saw waves is that they are not as easy to control and play over the keyboard as a synth. for some reason, i really dont know why. come to think of it, if you freq analyze a pure sine vs. a lowpassed hypersaw, thats probably why haha.