All through Apple's history of restore CDs, there have always been some that are model specific, some that arent, and some that will work on some other machines but not others.
For example, the iBook Firewire restore CD will work in a Blue & White G3, but not a PowerBook G3 Wallstreet.
It's always a hit or miss.
Although, I imagine if you have an Intel restore CD it likely wouldn't work on a PowerPC Mac.