For me it would be SW although ST is a fun one. You can nitpick them to death and personal feelings differ, but man ST is such the similar layout SW is just a bit diff'rent.
Really the scoring plays a big role in it, so if you're not familiar with DOT/SW multiplier rules I would look into that first.
Some people finds it adds a diff'rent spin on the games some don't like them for the same reason.