Messaging vs. Friends

Is there really any difference in the two?

Friends has a list of added friends and their avatar and the ability to view their blog from the list

Looks like messaging hooks to the same functionality, but more of a inbox feel with sent messages

now im weirded out lol, i sent a friends message and it showed up in the messaging inbox

after reading, RTFM lol, i guess they are tied together

Is friends the way to search for the "friends" and display on page via widget?
And messaging give it the ability to actually message between people

i suppose there is some overlap but i think you cold not recieve a message without the messaging plugin, but you cold have the messaging plugin without the friends plugin

maybe they should be combined.