811s, 48246s ,which one to use

hello all
finally got a new 811s after the cd writing laser died in the first one and i had to rma it, now i have it back im wanting to backup a few new games i bought, i have an 811s and an lg 8161b dvd rom in this pc im using and in my other pc i have a 48246s, i was wanting advice on which machine and therefore which drive to use, my older 48246s or my new 811s, and if use the 811s machine should i use the dvd rom as a reader or just the 811s as reader and writer,the games have starforce and safedisk on them.
thx maddog