I appreciate the questions, but it is a complicated series of questions, and it would take a long time to give an adequate answer. So it may not give you what you want, but here is a brief answer:
The former is in samadhi, the second in realization.
See above.
See my earlier answer on atammayatā:
I don’t think talking about “extensions” is very useful. Rather, they are both forms of desire, one for sense objects, one for rebirth in Brahma realms.
