Both sites offer the same type of services. I had trouble with both at different times.
If you ask me to compare server bases, I would say that yahoo is better.
If it was user compatibility, I would say msn.
Neither has that great of a mail agent or a search agent. Yahoo does have the integrated messenger for the web.
Which do you think is best in total? I'm not talking about just the messenger apps,or their search engines,but about all their services head-to-head against each other and who comes out the winner.
Now i know this was posted at a time where Microsoft is just coming off of dropping their offers to acquire Yahoo!,but this can still be spoken of either way.