Anyone who has used both of these apps, which one do you prefer and why? I am trying to decide between the two and both seem to offer the same thing and I can't seem to find any differences between them that stand out.

The only thing that I can't get to work with the trial is the options to disconnect. Instead of a busy signal (which is what I want) it acts like the "accept and hang up" option. Is this the case in the full versions?