Here is a tutorial done by Relic dirtyhands. She explains all the differences between 1&2. She also does a step-by-step for each function of the detector. She will be coming out with more. I hope this is helpful. It help me.
https://www.youtube.com/playlist?list=PLpymZHu8sv5nwrk34ID53OxszE8fjuDFC
https://www.youtube.com/playlist?list=PLpymZHu8sv5nwrk34ID53OxszE8fjuDFC