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Re. the first one, M42 I assume, SMC rubber focus grip or S-M-C metal focus grip?
I have the 3 versions prior to the rubber focus grip & the SMC A, the S-M-C is my fave as it handles flare the best of them all, for rendering I like the 8 element the most.
The first one is the K mount with the rubberized focus grip. I am planning to modify (disfigure) this by cutting/filing down the aperture lever that projects from the back and is preventing non LiveView use with the 5D MkIII, The second one, which is M42 and is the early 8-element Super-Tak, is amazing. Bokeh wide open have a dreamy look and the images appear very three dimensional. I bought these primarily for video and the Super-Tak is extremely good, with lots of detail captured, though slightly soft at the edges wide-open.
The Yashinon, on the other had, was the surprise of the pack. Great colors and rendition at 1:1, not too good for insects at 1:1 due to the very small MFD, but great for flowers and stuff. All three lenses are solid pieces, and the last two are full metal, with extremely smooth focussing and aperture control.