difference between pro-E 5 and pro-E 2 versions

I think this would be best answered a bit at a time by many different people. I'll start.

Pros:

Regeneration errors are handled in a decent way in WF5, unlike previous versions where everything just collapsed if there was an issue that needed resolving.

The trajectory rib tool in WF5 is very good and very useful when designing injection moulded parts.

Cons:

The assembly component placement UI, which used to be ok, is now dire.

The UI is now fragmented into 3 (three!) parts - 2001, WF and Ribbon. This is really appalling imo and feels more unfinished than usual.

Wildfire 5 has already been superceeded by Creo 1.0, which adds a decent curves editor, a "shaded with edges" view and the Freestyle feature (not a major selling point).

Creo 1.0 also lets you bend over pressed details in sheet metal features, which is neat (but probably not needed much either).

Pro/Engineer is used for all sorts from diggers to motorbikes to domestic products. Be aware that some features, such as Style, are still sold seperately and cost as much as the foundation package does.

Wf5 has:

more RMB shortcuts

No more failure mode

Import data doctor updates

Thumbnail previews

updated sketching constraints

updated dimension options in sketcher

Geometry datums in sketcher

move/ resize/ rotate tool in sketcher

Trajectory rib tool

dynamic edit

goemetry pattern and point pattern

measure volume of a closed quilt

improved intent edge

better explode tool

faster replace component in assembly

rmb repeat

faster component placement

Drawing mode can take some time to get used to, but also has its advantages.