Mine certainly aren't very extreme examples but I think they are the same phenomena. It starts with a clean white on the belly and on the better ones actually makes the white on the back (my 2nd one just has a faded ring around the back, the first one goes up the side a little but not all the way around). It's always the same place close to the tail. Wonder if it has anything to do with the umbilical?
Ringers are much more common in het pieds. I saw a double het albino pied girl once that had a pretty wide white band all the way around. But interesting that non het pieds can have it too. RDR coined the name “ringer bellies” for what most others look for in het pieds. Maybe whatever accident causes ringers is just more likely to happen in het pieds since they have a tendency to white belly anyway and a homozygous pied is almost sure to have ringers all over and not just the easiest place for it to happen with one or no copies of the pied gene.
Also the champagne gene seems to promote ringers but I've not seen a champagne in person yet. Do they have white bellies?