Bias is not better... it's a different program altogether; one that can work in conjunction with JamUp.

The idea being that you model your amp in Bias then export it to JamUp, where you add any effects you want, thus making a complete signal chain.

While you can use Bias as your one and only tone instead of JamUp, there is more latency in Bias. In a DAW that wouldn't matter of course, but for live use JamUp is the better choice. Despite what some have said, the amps you create in Bias do sound identical in JamUp if volumes are matched.

That said, Bias for desktop will be a killer app for recording - especially considering it has a new tone-match feature.

Personally, though, I'm hoping for JamUp for desktop. I just like the idea of a one-stop shop for the guitar tracks in any project.