deletion selection in infoPackage setting

Hi, experts,

I noticed two options of "selection Area" in deletion selection in infoPackage

1.Same or More Comprehensive

2.Overlapping

who can tell me what the exactly difference between these two options? the help of them is quict same.

in my case, one infoPackage setting period: 1 ~ 8 and country is China. if another infoPackage with setting Period:8 and country is china. it should to delete data in old request with period 8 and country is china. right? but in here, I think both setting is work in this case. then, how was the different usage of this option.

Thanks in advance.