A:Answer Hi gRANMA Debbie, here's a brief comparison between these two Handycams: The HDR-AS100V Action Cam has an outstanding image quality, simultaneous multi-angle shooting, improved blur reduction, and other features ensure you get great footage—while the compact, splash-proof design makes it ready for anything while the HDR-CX405 is an all-around Handycam with Optical SteadyShot with Intelligent Active Mode prevents camera shake and blur from ruining pictures. AVCHD and XAVC S formats ensure faithful and vibrant recordings. It's all so compact and always ready to go. I hope this helps, Dave