There have been several questions lately regarding the differences between the forks:
Accepting contributions from users and other programmers.
We don’t respond agrily to user requests, and contributions from other programmers. We wouldn’t have been this successful without the users and contributors. We love the people who have contributed logos, diagrams, suggestions, discussion, support on this forum and code contributions. One person can’t create a successful open source project. It takes a village.
Creating an application that is useful to the user base.
We want to meet the needs of several types of users, more than what is required for a particular family business 
Users can be defined by the set of features they need.
- People who want to make their own clothes or want to learn how to make patterns. Their measurement set is their own. They want to print finished patterns to desktop printers and tape the pattern together, then make their clothes from this reconstructed pattern. These users also want a pattern share to get new patterns from others and to share their work.
- Independent patternmakers who work with a known set of measurements that never changes, and who sends finished patterns to their single commercial client by PDF.
- Corporate users who make patterns for many individuals. They send finished patterns to cutting tables as DXF, or to designers as PDF/DXF/PNG. There are a few of these users on our forum.
- Artistic users who want to make very unusual patterns for very artistic creations. They need the same set of features as user group #1 above. Their work can sometimes be very difficult to visualize in 2D, so they need 3D visualization tools to check and improve their work. These users frequently export finished patterns as SVG and add additional design changes using other programs, like Processing or Adobe Illustrator/Inkscape.
- 3D character developers who want to make clothes for their 3D characters. This group needs features like group #4. They need the pattern share to download patterns and add extreme artistic variations and they need the 3D visualization features to check and improve their work.They need to export finished patterns as 3D mesh to use in games, films, phone apps, etc. They need to be able to import their 3D character.
- Corporate users who want to import 3D body scans, pull the measurements, and generate patterns. They also want to show their clients what the finished garments will look like in 3D. They need the features of group #5. Also they need the features from group #3 so they can send the DXF to manufacturers or to their own cutting tables.