Sigma 30mm vs Zeiss 24mm

In the lens section of his review of the Sony RX1 Steve Huff talks about the 24mm f/1.8. This is what he said

"When Sony released the Zeiss 24 1.8 for the NEX system I applauded this choice because it gives a 35mm equivalent with a quality lens and aperture. BUT when I shot with it I did not get that “Zeiss” feeling like I do when I shoot Zeiss ZM lenses on my Leica M."

link

and in his review of the NEX-7 he has this to say about the 24mm f/1.8

"The Zeiss 24 1.8 QUICKLY became my favorite lens on the NEX-7. While it is not clinicaly  sharp, it has character"

link

so I guess it has "character" but does not have the "Zeiss" feeling and is not clinically sharp

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NEX-7 & Sigma 30mm f/2.8
NEX-5 & 18-55 OSS
And a spare black 18-55