Hello, thank you for your feedback. The other model dimmer you are referring to, Skylark Contour model CTCL-153P, has the rocker on/off switch as well as the dimmer slider and can be installed in a single pole or 3-way application. Please see the below links for more information:
https://www.homedepot.com/p/Lutron-Skylark-Contour-LED-Dimmer-Switch-for-Dimmable-LED-Halogen-and-Incandescent-Bulbs-Single-Pole-or-3-Way-Light-Almond-CTCL-153PDH-LA/202519825
https://www.lutron.com/TechnicalDocumentLibrary/369683.pdf
We hope this helps! If you require further assistance, our 24/7 support team is here to help. We can be reached at 1-844-LUTRON1 or by email at support@lutron.com.