Well.. Mythos did mention what the difference is.
The topic in the titlebar is really shown but you can't click on any links or copy it.
Also he did mentioned he doesn't mean to ask this to be forced. It can be optional and off by default so anyone that doesnt want the display wouldnt even notice it.
I personally agree with Mythos's suggestion! If you're on an active channel and need to see the channel's topic you have to scroll up and then back down. Yes it's not a big deal if you think about it but having it on top of channels would make things more comfortable.
