Certanly Ansys have more resources but I woud like of know, about convergence, only in the area Structural the Pro-M is very different of Ansys ? I said in the final result for example Stress, displacement and so on.
I would have agreed a few years ago about Ansys having problems, but your really need to try it using the Pro/E plug-in and the new interface (same interface as DesignSpace), it makes Pro/Mechanica a waste of time... in my opinion
actually with version 7 and later Ansys redid the interface so that it was the same as DesignSpace - you can still get into classical environment if you're sick and twisted
As with Designspace, you need CAD specific modules to be able to import geometry. One of the nice things about these modules is that when you update the pro/e file, you can update the analysis and keep your loads, materials, etc (unless you deleted a feature that a constraint was placed on... then you have to fix that constraint).
Anyway, I think the Ansys WorkBench Environment (AWE) is as far above mechanica as Pro/e is above ink on mylar
remember you get what you pay for and my opinons are free