Disregard anything from Australia or Europe. They have different rules on spark arrestors. In the US, Terras will have round pipes with spark arrestors. Stradas will have the square pipes without arrestors. Spark arrestors and baffles are very different things. All baffles do some sort of spark arresting by default. But a screen spark arrestor doesn't baffle at all. All the bikes have baffles of some sort. That is what makes them quiet. Spark arrestors are only required on offroad bikes if I recall correctly, but several dual-sports have them. Hopefully that made sense.