What´s the difference between creation date and date and time?

Hi,

When using filters with photos in Adobe Bridge, you have to options filtering by date. You have "creation date" and "date and time, original" ( I am not sure if those are what they are called in English, I am using Bridge in my native language.)

Am I right to guess that the first one is when the file is created, the second one is when the photo was taken? 

I am curious to know why, when I am filtering photos on my memory card, those two filtering options sho completely different amount of photos? As I said, I am filtering the photos on my memory card before importing them anywhere, so I haven´t created any new files yet. If for example I choose to filter only RAW-photos on the card and then have a look at the creation date (Jun 24 for example), it might show 190 photos. Then, when I look at the original date and time, it might show something like 220 photos, with the same exact filters. Why is that?