Difference between VS08 and VS0A

Maybe I missed it, but what ARE the differences between VS08 and VS0A? It seems it is a matter of personal preference. Is that right? Which is the later of the two? I looked at the date each was last modified and VS0A has a later date, but it seems everyone is using VS08. I have the Lite-On 851S.

Please do not crosspost. I’ve replied to your thread in the LiteOn forum.