As Kanzlr said, hard to compare. You should better compare a Kaleinar 150/2,8 to the Zenzanon lens or a Zenzanon 80/2,8 to the Biotar, otherwise it will pretty much be a 80mm vs 150mm bokeh comparison, less to the say that the 80mm are Planar-types while the 150mm lenses (I assume) are Sonnar-types.