Considering the Carl Zeiss 24mm

Hi!

I'm a recent Nex convert. After trying the Nex 7 for about a week I just had to own it. I have had alot of fun using it with old manual minolta lenses. And I'm without a doubt getting the 50mm 1.8.

I'm torn on the Carl Zeiss on the other hand. Mostly because I already own a Fujifim X100. And I love this camera. But I'd love a perfectly technical comparison. How will a Nex 7 with the Carl Zeiss compare to the X100? My plan is to possibly sell the X100 and use that to fund the Carl Zeiss lens.

As for resolution and speed, those are obvious benefits, but I feel having the posibility to use them both at the same time, outweighs those.

So what other benefits are there to a Nex 7 with the Carl Zeiss lens over a X100?

I'd love some brainstroming