Not that simple. Catia is required by the aircraft OEMs, can't use anything else. The other two (Creo and Geomagic) are used for all jig and mould design and there are years and years worth of work tied up in them. Plus they're fully paid for. Switching now is gonna cost a massive amount of cash and time.

Besides, what pro CAD system run on Linux? SolidEdge is the only one I know of...