They are not the same.
A System Repair
disk can be created using Windows Backup and Restore. It contains a so called recovery console that helps to repair most common boot and functionality problems. System Repair disk is quite small, you do not need a DVD for that. An empty CD is enough to create a system repair disk.
A Recovery Disk Set
is a set of DVDs that can be used to completely restore your PC to factory conditions. It contains the operating system for instance Windows 7, hardware specific drivers
and (usually) a collection of bundled software also known as crapware
. For instance on this laptop (see my specs) the recovery set is 4 DVDs.
- System Repair Disk = A CD, to fix boot and functionality issues on a PC, not for reinstalling
- Recovery Disk Set = Multiple DVDs, used to restore PC to factory conditions (reinstall)