The "extra quality" designation generally refers to the metadata and integrity of the files:
: This tag suggests the files are verified for accuracy (often matched against the Redump.org database) and stored in efficient formats like WBFS (Wii Backup File System), which removes "garbage data" from the disc to save space without losing game content. Why People Seek It wii rom set by ghostware part 2 extra quality
In standard Wii dumps, you often find scrubbed ISOs (removed update partitions and padding to save space). While great for an SD card, purists hate them. Essay: “Wii ROM Set by Ghostware — Part
: The collection typically utilizes No-Intro or Redump standards, ensuring that the ROMs are accurate 1:1 copies of the original retail discs without corruption. Verified Rips : The collection typically utilizes No-Intro