It is widely considered the most stable build of the CS6 lineage.
The Extended edition includes every feature found in the standard Adobe Photoshop CS6 , with several critical additions for specialized workflows:
Released as the definitive update to the iconic Creative Suite 6 lineup, this specific build remains a legendary milestone for graphic designers, photographers, and digital artists who preferred a one-time software purchase over the subscription-based Adobe Creative Cloud model. The Significance of the 13.0.1 Extended Version
The designation indicates this version includes all standard Photoshop features plus advanced tools for 3D image creation, motion-based content editing, and precise image analysis. Key Features of CS6 13.0.1