A couple things I have learned after reading this post...
Navionics has the entire lake mapped in sonarchart layer, Genesis has partial.
Happy to help more on how to convert Lowrance mapping, this link will help: https://navionics.secure.force.com/kb/articles/en_US/Knowledge_Article/How-to-Record-Sonar-Logs-With-Your-Lowrance-Plotter
Someone else mentioned the Lowrance Elite TI can’t draw live compared to Humminbird and Garmin. It can with the Sonar Chart Live feature. How to do SCL: https://navionics.secure.force.com/kb/articles/en_US/Knowledge_Article/What-is-SonarChart-Live/?q=how+to+do+sonar+chart+live&l=en_US&fs=Search&pn=1
If I can help more leave me a comment...