I've used both. I wasted my money paying a little fortune to buy VidBlaster. And this was a mistake.

- Very Unstable
- Absurd concept of GUI
- No real layers
- No Alpha
- Stream unstability
- High Frame dropping under a good designed hardware
- Barely no assistance

Wirecast simply works well. It has bugs, of course, but is not the nightmare vidblaster is.

I don't know if really wirecast is the best software, but I know what is vidblaster. Really, don't waste your money buying this product.