I looked at those 4 drives.
There isn't really much difference. Some have Software included with them, and the top one dosn't have any software as far as i can tell, but it's the OEM version instead of a retailers version. This means it's straight from the manufacturer. This is sometimes better, and i try to keep most of my stuff OEM myself, but in this case i don't know, and it's entirely up to you anyway.

Don't know what the CLV means, but i don't think it's necessary to know. It's probably just a standard thing, but perhaps other people who read this post will know.

What $140 ones?