Well, I must admit it was an early build, there've been several updates since I've tried it last. You may find Sharp Construct to be more stable now. I'm personally looking for something to work along side with Silo and am waiting for a Mudbox demo to make a final decision.

Alot of the tools we use do share similar ideas, it's the way those ideas are presented and implemented that determines how well it performs in the way you like to work. 

I find Silo suits me but the developers aren't trying to make it a sculpting app, instead, they're trying to give its users a place they can begin sculpting or do test sculpts with before moving to a program like ZBrush or Mudbox while at the same time, offering a great polygon modeling/uvmapping solution. I personally find Silo's sculpting tools to be strong enough to compete with both ZBrush and Mudbox, the only limiting factor is that the current beta can't get over 2.5 million polys on my PC where ZBrush could.  So I guess I can see why the developers feel the way they do. So I'm in a similar boat, I'm looking for something that not only works well but works well with the way I like to work. From what I hear, Mudbox is the closest to that but I don't jump on any ship without testing first after my experience with Hexagon. :)

I guess what I'm trying to say is give them a try and see which one feels right to you. None of the program's demos are permanently on your drive, you can always uninstall if you don't like a certain tool's workflow. There's no harm in doing what you're doing, looking for a program that "clicks" is something even pros are doing (otherwise, there wouldn't be as many  choices).