What the heck?!
The heck is that you are trying to compare two completely different types of drives......a USB or FireWire type of drive that is connected directly to your computer, called a "local drive"....and....the Time Capsule drive, which is a "network drive".....since it connects to the network and shares data with network devices.
Time Machine stores backups differently on a local drive than it does a network drive.
On a local drive, all of the Time Machine backups are stored in a normal folder called Backups.backupdb.
All of the Time Machine backups on a Time Capsule are stored in a special type of container called a sparsebundle file, with the name of your Mac associated with the file. Apple does not really want you trying to get into your Time Machine backup files on the Time Capsule using the Finder, so they make it difficult to do so.
It is also very easy to corrupt a file when you go into the sparsebundle, which may damage all your Time Machine backups and render them useless. For that reason, it is not recommended that you try to access your Time Machine files this way.
We can tell you how to access the files if you want, but we cannot accept responsibility for any difficulties that you might have if you do this, or help if the files are damaged.
It's up to you.