Difference between Matshita UJ-822D and UJ-832S

Anyone knows the difference between Matshita UJ-822D and UJ-832S?
I can’t find any information about these drives.
Thank You.

I have got my DVD-Ram drive UJ-832S.
The burning max speed is:
CD/CD-RW 24/16
DVD-R/RW 4/2
DVD+R/RW 4/2.4
I have tested CD, CD-RW, DVD+R, DVD+RW, DVD-R and it’s capable to burn at the max speed over.
The DVD-RW and DVD-RAM I havn’t tested yet.

Isn’t it a 8x writer?

BTW, this is a user REVIEW forum and your question belongs to the general ODD forum.