Edit: Didn't really understand your above definition of choice blindness versus inattentional blindness, scholarpedia has a good contrasting definition:

Change blindness refers to the failure to notice something different about a display whereas inattentional blindness refers to a failure to see something present in a display. Although these two phenomena are related, they are also distinct.

Change blindness inherently involves memory — people fail to notice something different about the display from one moment to the next; that is, they must compare two displays to spot the change. The signal for change detection is the difference between two displays, and neither display on its own can provide evidence that a change occurred.

In contrast, inattentional blindness refers to a failure to notice something about an individual display. The missed element does not require memory – people fail to notice that something is present in a display.

In a sense, most inattentional blindness tasks could be construed as change blindness tasks by noting that people fail to see the introduction of the unexpected object (a change – it was not present before and now it is). However, inattentional blindness specifically refers to a failure to see the object altogether, not to a failure to compare the current state of a display to an earlier state stored in memory.