What are the main differences between these two tools, or other password management tools?

What sort of questions could I ask myself to determine or rule out a possible solution?

I am looking for something that:

• can be accessed through my iPhone, ideally with logging into websites
• can be accessed from a usb drive
• can store other data like financial information in
• can store multiple accounts for websites such as Gmail

Answers will be voted up by how much easier they make my choice between note apps.

I loved the way Senseful answered another question, where he stated the things that each of them do better.