Nikon 24mm f/1.4G for landscapes?

I own the 24mm f/3.5 PC-E and am considering a swap for the 1.4G. I shoot mainly landscapes. Something to note here; I also own the magnificent 45mm f/2.8 PC-E so I wouldn't be giving up my tilt shift options - the 45mm PC-E operates and provides results which I think are much improved over its 24mm brother...

Question is would you really recommend the 1.4G over the 24mm PC-E for landscape work? I'm not 100% convinced by the 24mm PC-E - it suffers from noticeable CA at times and I'm thinking that image quality generally must be improved in the 1.4G. To be clear I have no ambition to start shooting landscapes at f/1.4 (actually that's not entirely true because I'm thinking about trips to Norway/Iceland to shoot the Northern Lights at some stage) and I've also considered the Zeiss 21mm ZF.2 lately as a further alternative.

Other than the obvious gains (auto-focus and big aperture) will I notice improved image quality with the 1.4G?

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