For pure comparison I uploaded 2 pics side by side made by A6000 with: Sony Zeiss Sonnar 35/f2.8 prime vs. SEL1650 Kit lens (supposed to be much worse in quality) :
Sony Zeiss Sonnar T :
View image: DSC04444
SEL1650 Kit lens :
View image: DSC04445
and one more:
Sony Zeiss:
View image: DSC04446
SEL1650:
View image: DSC04447
The only difference I can really notice is here with text displayed:
Sony Zeiss:
View image: DSC04448
SEL1650 :
http://postimg.org/image/qgrf3npn3
If you click on the image again, it will enlarge it.
So in my conclusion, for a regular outdoor shooting I could not justify spending $800 for Sony Zeiss, I will never shoot text in a newspaper, other pics show no clear difference to me. Perhaps in lab conditions you can see with human eye, other than that, we are splitting hair and cheaper 1650 is a fine lens for 99% of population IMHO. Or do you see something I don't?