I bought this lens almost simultaneously with the new 1.4er, actually with the intention to send them back again, if I like about so much more the new.
Well, I have to keep both, partly because I was able to acquire the 1.4 in the bay extremely low and thus the Linsenbuget "has not been exceeded.
Furthermore, the 2.0 has but also advantages: it is very small, very light, and the AF is significantly faster than when 1.4er. I want to mainly use it in the street photography, where you can D600 and 35 2.0 act inconspicuous with the nondescript team. The short lens is not as obtrusive, yet highly efficient, the edge blur at open aperture can be used specifically as an effect. The 2.0er produces expressive and evocative images. In the Street Photography weaknesses likely to be advantages.
Will you still sharper: up aperture and ISO.
It's fun, "use these classic cars, from me there is a clear buy recommendation and 5 stars for price / performance (4 for optics and 6 for the price, it would be exactly the 1.4er vice versa).