That still doesn't answer the question. Do you have a link to this?
Either way, it'd either be "Dual Atom CPUs" or "Dual Dual-core Atom CPUs". Dual twin core makes no sense
As for having two N260 atoms in a single machine.. whats the point? You can buy dual core atom chips already which would essentially be the same thing (two physical cores plus the two Hyperthreaded logical cores) and most likely use less power. That is just bizarre.
(oh, they might have done that before the dual-core chips were released)