Isco ultra star plus vs schneider Cinelux

[Kanishka]

I'm between this two options. I'm looking for the sharpest and aberration free anamorphic element. I dont need flares either. I would appreciate that users that have used them share with me the pros and cons of each lens. Also would like to know the diameter of the rear of this lenses and which you think is the best focal lenght to combine with them.

Thanks!