I owned a 7d for about 10 months before I upgraded to the 5d mark 2.
The 7d was spectacular, the 5dmk2 is also spectacular. I like them both. I can't put my finger on why, and it isn't for most of the reasons stated here, but the images from the 5d have something the 7d doesn't. I feel like the 5d has soul.
But I do miss things about the 7d -
I miss the 19 points of autofocus - with the 7d I never needed to focus and recompose. I find myself focus recomposing a lot with the 5d.
I miss the wireless flash mode. That is to say I don't miss having a pop up flash, cos I never used it, but I miss being able to set off my 430exII wirelessly without having to add triggers
I miss the artificial horizon.
I don't really miss the extra frame rate, but I don't shoot lots of sport and wildlife.
I miss the 720 50fps video because I liked doing slow mo.
The biggest thing I prefer about the 5d is the noise handling and also the wider nature of all my lenses. I always felt my lenses on the 7d were too long, indoors i never seemed to have enough room. They all feel the right length now.
The noise on my 7d was nowhere near as bad as the samples in this thread, I know there were some problematic earlier models but mine was excellent with noise.
As for landscapes and portraits though, I dunno, unless you view at large prints I'm not sure there really is much of a difference. I view all mine large on my 50 inch TV so I think I can see the difference. But can you tell which shot was from which in these both shot with the same lens:
this one is at ISO 2000 by the way