I'd say I'm fairly confident in soldiworks now. Now these are all parametric, if I move my screw, the cb and tap move with it, if I change to a bigger screw, the cb hole and tap change as well.Im a mechanical engineering student and have been using Solidworks (and Inventor) now for around four years and have, over the last year, been learning the more advanced modules such as animation and motion studies, fluid flow simulation and stress analysis. When I add my shcs to the assembly and constrain to to a block sitting on a plate, I can turn on reference set for the counter bored hole, activate the block, link it into the block and subtract it out, then activate my plate, turn of tapped hole reference set, link it into the plate and subtract it out, then activate assembly, set my reference set to the main solid shcs. Each one is set on a different reference set. For example you can have a socket head cap screw designed, then you design the counter bored hole on top of it and then the tapped hole solid with a simplified thread on top of it. Its similar to copy geom, but it can reside in any file or assembly. I've watched the videos and participated in one on one demos, and the things they can do with this software, and speed with which than can do them blows the doors off anything I every seen with Creo (including B&W's Smart Library, PTC's Progressive Die Extension, etc.) It truly is amazing, and if I was starting or running a die design business, I would be hard pressed to compete running anything else. die design, the only thing that might make me jump ship from Creo is Logopress for SolidWorks. Of course in Creo, almost nothing is pre-built for you, so it will take time for you to build a library of common parts, customize fasteners to your liking (or create your own), and develop a methodology for how to construct things, but Creo is very, very capable. There is nothing we needed to do that would couldn't do with Creo and the Advanced Assembly extension. We designed everything from little bracket dies with only a couple of stations to mammoth, 20' long dies with dozens of stations, aerial cams, manifolds, etc. (I've also had some experience with Catia.) The company I worked for previously specialized in designing both progressive and transfer dies.

I've never used NX, but I've used Creo extensively for over 11 years now.

Nx creo