Is there a difference between the baseball and softball Diamond devices?

No. Diamond Baseball and Softball teams use the same app and devices. The device model is legal for both sports.

At GoRout, we offer on-field, one-way communication player devices for baseball and softball at all levels. There is no difference between the baseball and softball player device, along with the coach sending device. These can be used interchangeably (rule-permitting) between the two sports.