I prefer the look of the first one... It looks more relaxed, while the second one looks too small in the upper arm area. The first looks cooler, and the second more feminine. I would imagine that with jacket lengths, your vertical proportions are more important... Like, are your legs long, your torso short, or the opposite, or are you long in the rise etc. The length that makes you look the most balanced is ideal (in theory). I have a long rise, and so I avoid shorter jackets, because it emphasizes it.