They are basically different versions of the same product. When the replacement for P3 was first released it was known as Primavera Project Planner Enterprise, which was soon shortened to P3E. There was a v3.5 and a v4.0 of this product, before the name changed to P5 and then P6 in line with the version number. When Oracle acquired Primavera Inc. in 2008 "P6" became a BRAND name rather than a product version and so the next version (ALTHOUGH sometimes referred to as P7) was OFFICIALLY named P6 v7.

The latest products have followed normal Oracle PRACTICE in being "releases" rather than "versions", and were called P6 R8.0 through R8.4. The latest software is P6 R15.1 - Oracle is now using the last 2 digits of the year of issue as the MAJOR release number, and has stated that it aims to produce 2 releases per year so that in each year there will be a yy.1 and a yy.2 release.

They are basically different versions of the same product. When the replacement for P3 was first released it was known as Primavera Project Planner Enterprise, which was soon shortened to P3E. There was a v3.5 and a v4.0 of this product, before the name changed to P5 and then P6 in line with the version number. When Oracle acquired Primavera Inc. in 2008 "P6" became a brand name rather than a product version and so the next version (although sometimes referred to as P7) was officially named P6 v7.

The latest products have followed normal Oracle practice in being "releases" rather than "versions", and were called P6 R8.0 through R8.4. The latest software is P6 R15.1 - Oracle is now using the last 2 digits of the year of issue as the major release number, and has stated that it aims to produce 2 releases per year so that in each year there will be a yy.1 and a yy.2 release.