Chronograf has a lot of nice graphing functions which are worth checking out. The UI design is in some senses “slicker” than Grafana’s. And you can also use it to manage Kapacitor scripts and other Influx features. That said, for pure data visualization, Chronograf’s functionality is not quite as extensive (and in some respects quite as mature) as Grafana’s. So if you’re already running Grafana and you’re happy with it, there might not be much to gain from switching to Chronograf.