Rom regions in memory and on chip?

[Ryan VanRiper]

Wondering about how flash rom's typically operate in memory and if they
are always/sometimes copied too and executed in physical memory?  I'm
guessing yes, as it's faster then running directly from the chip.

If so, any idea if these memory regions are consistently the same on
each boot ?

Also, does it make sense to dump both the rom on the board, and the
copied to memory rom ?