I may be way off (it's happened often before), but this is how I understand CVO vs SE:
Screamin Eagle is the name for HD's aftermarket performance parts division. Screamin' Eagle people can be those who upgraded their standard bikes with Screamin' Eagle parts.
CVO stands for Custom Vehicle Operations, whose bikes come stock with some Screamin' Eagle parts from the factory, and they are named by the factory as SE (Screamin' Eagle) FLHX, SE FXDFB, or SE whatever, depending on the frame and model.
All CVOs are SEs; many regular HD bikes that have been modified with Haley parts are referred to as Screamin' Eagle, but regular Harleys, whether modified or not, are never CVOs.
For the purposes of this forum, CVO and SE are interchangeable, and people here are both CVO AND SE people.
If you go to EBay and search for Screamin' Eagle, you'll pull up mostly CVOs, but also few standard Harleys that are modified.
I've probably caused as much confusion with this explanation, but at least I understand what I said. I think.
