Upload & Sell: On
Be careful comparing photozone's stuff between systems. The 35/1.8 was tested on the NEX-7, so using a 24MP sensor. Therefore the baseline numbers are inherently higher (3000 is amazing on a 16MP sensor, but only 'very good' on a 24MP sensor). I don't know what's going on with photozone's XF 35/1.4 either....mine is significantly sharper in the corners stopped down than what they're indicating.
Looking as a percentage of maximum resolution, they seem to be relatively close at comparable apertures. I'd wager the the Sony has an edge on the image borders at wide apertures, but the Fuji looks a little sharper in the center. Probably not much to pick between stopped down.
I will say, the Sigma 30/2.8 is sharper than my Fuji 35 with both at f/2.8. I'm incredibly impressed with this little lens. (Photozone agrees...it broke their resolution record when tested). After shooting with the NEX-6 a fair bit last night and this morning...I still don't like the controls and ergonomics, but the image quality is quite good - not going to sway me from my main Fuji kit, though. I've got the Zeiss 16-70 coming tomorrow for review so that should be fun.
Here are some shots from this morning, all with the Sigma 30.