There are multiple factors that end up leading to a particular location of an experience packet. The distribution of experience must be more or less optimized for the maximum potential entropy reduction for the system along with many other considerations. Generally, those with less experience do less planning and are less structured in their approach to a new experience packet -- typically accepting whichever birth opportunity they are directed towards with little care as to what the situation is. As a rule, lower levels of experience are better off with situations that present fewer pivotal choices.
The answer to your question is "yes". Since the distribution of experience dynamically optimizes learning overall, one would not expect it to be uniform, thus, there is no doubt that there are variations in the density of experience from place to place and that the locations of these variations change from time to time. There is no value, except to the ego, in trying to determine what density is where at any given time.