They both are quite up to the task, IMHO.
I have to admit a bias here. In that I have grown up on the Sonic Foundry (now Sony) products ever since SoundForge v2 (Windows 3.1x, 16-bit), and currently use CDArchitect, DVD Architect and Vegas on a fairly regular basis.
While I first turned on to Steinberg back with CubaseVST (also the 16-bit version), I have always felt more at home with the SF stuff simply because I by default have more hours on it. I'm not saying that it's intrinsically "better", it's just the look/feel that I've gotten used to. I'd prefer to stick with the SF stuff myself, but only because it feels like a broken in pair of blue jeans to me, I'm comfortable with it. And I wouldn't hesitate recommending it to anybody, because it does it's job and does it well.
But that does not mean that I don't recommend the Steinberg stuff. I know at least a few folks who grew up on Steinberg jeans that feel as comfortable for them to wear as the SF stuff does to me.
And as far as I can tell, as far as critical functionality, there isn't a whole lot of major difference between the wto bundles; they'll both get the job done relaibley and efficiently.
G.