There are many Caltars... Caltars of recent vintage are Rodenstocks, and of the recent ones there's a 72 degree lens and a 75 degree lens. The Schneider Symmar-S is a good lens, but probably 2 generations old. Nikkors are not that easy to date.
With no more information than I can get from the list, I'd probably choose the Schneider all things equal. If the Caltars are the late Caltar II-N or Caltar II-S, I'd choose that one because it's a later lens.
If they're all the same vintage and all in the same condition, there isn't a lot of difference, so if one was sunstantially cheaper than the others, I'd go for it.