Darke Fin: differences between Slalom SR6b and pro

[emil]

I hope someone can answer me while I'm waiting for a Deboichet custom fin.

What are the differences between fin Drake Slalom SR6b and Slalom pro, both same size around 46cm?
I know they are production fins so I don't expect a lot but for sure there is a difference between them.
I mean: speed, upwind, control, spinout, sea condition.
Any comment very wellcome.
emil