While the dimensions and weight are facts, the "feeling" of portability is just that. If you have a tiny briefcase or backpack or cargo pants pocket that ONLY the 11" will fit, well there you have it. But at just over 9 ounces heavier and one inch wider/longer, the 13" fits is just about any "normal" briefcase or backpack. And being just as thin as the 11, you can slip it in there just as easily.
So in terms of portability, I see them very, very close together. A lot closer than some posts here make it seem. 😀
And my advice to people on the fence is that you will be USING it a lot more than you will be CARRYING it.... 😎 Choose accordingly.
Touche on your last point there, but I would counter that the 11" factors positively into usage as well since what you say makes it sound like the 13" is the only one that benefits in that situation. For example, I find that the 11" sits and balances quite well on one leg (not saying the 13" doesn't but the length/width approaches or even is at the same as a standard laptop), there are no black bars at the top or bottom while watching a movie (as far as I've seen for movies), and I've read from others that it fits airplane seats better, etc. I just got mine a few days ago so still testing it out but the size actually augments my looking-forward-to-ness of using it, if that makes any sense.
I personally never use SD cards and I've heard that, although screens on both sizes aren't top notch, the 13" makes the contrast issue (getting differing values of contrast even at slightly different angles) more pronounced as there is more vertical viewing angle. This last issue makes me think hard on getting the 13", as it might make any web/graphic design a bit tougher. Again, I realize the 11" is not top of the line either but the issue is supposed to be less of a problem.
The 11" is also just small enough that its size does indeed make a difference, I'd say. Yes, it's only so and so lighter or longer/wider so it's not that much but when you actually hold and use both to compare, there is definitely an appreciable difference. Still testing so will be doing more work on it, etc to see and I may very well change my tune in the end, but I can definitely see the benefits of the 11"
Edit: Just discovered another very crucial benefit of the 11"
😛 -- it fits
just right sitting on my torso as I recline low in bed with an upright pillow behind my head & neck against a wall, where the MBA is nestled between where my ribcage starts and my right thigh, the back part of the MBA sitting on my right hipbone, as my right knee is bent upwards and my left leg is entirely resting on the bed so that my left backside is supporting most of my weight (if that description makes sense). Mousing around isn't bad at all while typing is a bit awkward, but that would be true of any size laptop. The point is that the size from front to back of this is just right.. any longer and it would not fit in this position (that I likely will do when just relaxing). Not sure why I went into so much detail with this one but there you have it
🙂