Normally, ZE lenses cost just a bit more (around 50$) more than ZFs. It may have to do with just a little bit more electronics in the interface.
As regards the 35 f1.4, strangely with Zeiss, the very fast glass has not always been considered the best. Some very knowledgeable shooters prefer the Contax 50mm f:1.7 to any f:1.4, and the previous 35mm f:1.4 was not always considered superior to the excellent f:2.0. So, yes, I am interested, but it is not a foregone conclusion AFAIAC.