Again, "Zeiss" is selling way overpriced lenses with obsolete MF with PR smoke and mirrors. The mere observation that some posters are thinking the OP has mislabeled the samples demonstrates this!. Whether there are untested corner differences between the lenses or the OP has inadvertently mislabeled the samples, I don't see $4000 difference between these lenses. Only Donald Trump is going to pay $1000 per corner for this Zeiss. Who do they think they are? Leica? :-D
I dunno, I have four "Zeiss" lenses, and I'm quite happy with them. I don't pay $4,000. for a lens because that's not on my horizon. I also don't pay $2,000. for a Nikon Zoom. I did just pay $3,300 for a d810 because I know I can make full use of the "Zeiss" lens' resolution. Plus I get all that special Zeissyness.
I guess what people are asking is what constitutes 'Zeissyness', and whether it can actually be determined in a proper (double blind?) experiment. The OP, while not performing a proper double blind test, did provide some careful samples, and I for one would not be able to reliably pick which picture was taken with which lens based on rendering, sharpness, etc. (The only giveaway in this case would be the difference in metering / light transmission).
Anyway, a proper experiment would be very interesting to see, but I don't see it happening any time soon... it would take a fair bit of work, and many people with access to Zeiss lenses would not be interested in doing it, as the results may diminish the perceived value of their expensive lenses so why spend the time.
Cheers