SoftStep 2 will:
Have state recall in Standalone mode
Allow for the full 60 modlines in Standalone mode (SoftStep 1 is limited to 50)
LED backlighting instead of EL wire (no more physical hum)
Have more sensitive sensors (which is a plus for me personally)
Have a faster scan rate and processor speed, which means notes with variable velocity are now possible
Maybe not enough to send all SoftStep 1 owners running out to get one, but it's still a step up from the original design.
2, 3, 5, 13, 89, 233, 1597, 28657, 514229, 433494437, 2971215073