In case you have conflicting packages, zypper offers options to solve the conflict and you can choose, while Discover simply errors out. So use Discover if you like it, but be prepared to use zypper if Discover quits with errors.
In case you have conflicting packages, zypper offers options to solve the conflict and you can choose, while Discover simply errors out. So use Discover if you like it, but be prepared to use zypper if Discover quits with errors.