All I can say is to evaluate all of the features completely. For me, SC is a little backwards in that you select a tool but the Feeds and Speeds are actually defined in the machining operations, so it changes on every operation. I have been looking again at VisualMill and I can assign default F&S's and then change them at the individual operations if needed. I have broken a lot of endmills because I have forgotten to reset a parameter in SC. Just makes better sense to identify the proper S&F for a particular tool once, not in every application unless the material changes (I think BobCad goes further in allowing S&F per material type for each tool)
Good luck, for me I doubt I would need all the features in the Pro version, but I do want to look at the extended simulator option.
As far as support. Both programs offer great support.
I actually have the VisualMill version that comes with Alibre and so far it seems all of my operations can actually be done with that version. So good to evaluate against SC for now.