Own both. My 75B with standard safety (not decocker) was my first full-sized 9mm. I liked it so much that I had to get a somewhat similar Mk. III HP, and then other CZs and a "classic" HP.
If the choice were between a 75B and a Mk. III HP, I would get both, the former first to take care of my defense/sport needs, and then the latter when I had the money.
But you favor a pre-B, so my comparison does not fit your parameters. I have never had the urge to own a pre-B. I mean no offense: Is there a practical -- not aesthetic or sentimental or collecting reason -- for this?