Both OBS and Wirecast is a great software for livestreaming, of all the livestreaming software, only the duos are well recommended, both are quite interesting tools with lots of advance features. OBS is completely free with all unique features whereas Wirecast offers a 30 days trial package, so it is good to find some time to use the trial version to get idea about its interface. Wirecast is easy to use compare to OBS, while OBS has a Drag and drop plugins, I can't really say which is better between the two, because both has a great features..