I have been in engineering since 1974, and have used every major CAD application in widespread useage since the early 80's. I developed and distributed three AutoCAD add-ons in the mid 90's, an effort requiring a detailed understanding of CAD database structure. My opinions are based on first-hand experience, and not clouded by emotional loyalty to any particular product or software vendor. Autodesk is a billion dollar company with around 3000 employees, based in America and employing an American workforce. SW is owned by Dassault (French) and outsources its programming to India. Whose product would you expect to be superior ?
Autodesk, to my knowledge, does NOT disseminate information about their competitors, other than comparitive sales figures from independent sources, industry analysts such as Daratech and Dataquest. I work in a predominantly SW environment, and have used the product when necessary since its introduction. The lack of contemporary features and instability have caused me to move any of my crucial projects to Inventor, a product I have also used since its inception.
To anyone who has doubts about the true industry leaders in 3D CAD, I would suggest that if you are serious about keeping current on this topic, study to become a recognized and reviewed software developer, and/or join the subscription websites that compile accurate and unbiased industry data.
Unless I am mistaken, this forum is for those of us who already use Inventor, and genuinely appreciate its stability, compatibility, and depth of developement.