Looking for a developer edition of SQL Anywhere 12

I have an application that communicates with a lot of SQL Anywhere 12 instances.

I need a developer edition for the same for testing locally.

Is it possible to get that from anywhere?

I know I can get the SQL Anywhere 16 developer edition from the website, but I wanted the 12 one just to be more accurate in my testing.

If it is not possible, does anyone know if I *could* just test on the 16 version and be safe?

i.e.: what are the major changes between 12 and 16?

Thanks,

Pranay