SP-FORUMS

You can also resample patterns being played from pattern sequencer, which is another thing you can't do on 404sx. So even tho only one sample can be loaded at a time in the "keyboard" mode, which is the mode that spreads a sample over the 36 keys (and this means the second pattern seq track can only ...

Also, the MS has a bit more flexibility for external sampling than SP404SX (not sure about other Roland samplers, maybe 555 is good about this). On MS, you can play a beat that is sampled on a key, for instance, while you sample through mic or line-in. This can help when you want to sync (manually ...