Hi
Welcome to CIC
I'm a canon user but if I look at the 24 mm pc-e this lens is more designed for perspective correction by shift/tilt. The 24 mm 1.4 lens does not have these features but has a higher opening.
I think it depends on what you want to do with this lens. If you want to shoot architectural kind of photography go for the PC-E lens. If this is not your plan and only need the wide angle of the 24 mm then go for the 1.4 lens.
Also you have to get practiced on a PC-E lens how to use the shift/tilt and also the manual focus.
Quality issues, I think that lenses in this price range are simply top of the line so I would not bother about that to much.
I just found
this link that might interset you.
But of course Canon is better