What is the difference between Catia V5R20 & Catia V5R2013. Anybody please explain!!!
go through the below link ,,,,there u will get all the details about catia....
There are many changes in the above levels, you can find that on V5R2013 DS documentation in 'what's new' section in each workbench documentation.
Apart from this, in each level, there will be huge performance, consistency should be increased along with added new features.
Also you could find that V5R21 & V5-6R2013 levels has naming difference which shows that V5-6** levels are more compatible to V6, they are designed by thinking of compatibility of V6.
Please let me know if you need further more information on this.