LiteOn 451s -> LiteOn 812s

I’m new user of this board. I have one question to You.
What is different between Liteon 451 and Liteon 812?
I flash my drive (451) which firmware (hacked) from 812. The hardware its the same?

If you have to ask then you don’t know enough and shouldn’t have performed the “upgrade”.
Read this.

Hi there…

Could you please give me some info on where i could grab the 812 hack for 451 ?