Hi Diki. It is just about preference for me . My brother uses cubase , i use the onboard sequencer. The difference is that where ever i am i am just seconds away from capturing an idea and padding it out on my onboard sequencer into a very detailed production whereas my brother cant. There are very many like me and my brother which is why the manufcaturers continue to make instruments that are capable of dealing with both sets of requirements.

Thats not to say i will never use a software sequencer but for speed and accessibility you just cant beat a hradware sequencer buiolt into the instrument you make music on.