Dark Star vs Dark Sonic

What are the differences in play? they look so similar in specs, and shape.

I believe the Dark sonic is based on the Dark Star, then had some qualities changed. The Dark sonic is a bit wider and bigger, also heavier. Dark Sonic also has the “Double V” catch zone, which I’m not sure if it work or not.

I haven’t tried any of the two, but those that I know that have are pleased with either their sonic or star.