VeeTwin,,,,
PJ is correct.. 2010 is "later" ,, so you can use a Snell 2010 whenever you get it,,,
I have an SA2005, ( I will continue use it when I run the Vicky), I need to buy a new Helmet with the accommodations for the air circulation system, so I will wait and get a new 2010 in the next few months to use in the Stude.
Charles