Opera Mobile VS Opera Mini

[Stingray]

Guys...
What is the difference between Opera Mobile and Opera Mini?
I know that If you install Opera Mobile to the SD card you might end up getting DSODs.
Is it the same case with Opera Mini?
Has anyone tried the Mini of a 6700??
ALL I do with my browser is surf the web..... I like Opera because it formats the page,
so you don't have to do any horizontal scrolling. Can I do the same with Opera Mini?
Is the memory requirement less than compared to its bigger brother?
and if the Mini is installed in the SD card can the cache be stored there as well?
Much thanks