LOL!! And I thought I was the only one that used that term P for Professional! lol I jokingly tell that to those that ask me what all the letters meant. Pretzel...ya made my day, bud!
To answer the title of your post. Generally speaking about current dslr cameras I would reason the lens is.
To answer the question in the post. I would say even a kit lens has a somewhat sweet spot. With that said so many variables come into play. Across the board considering varying light conditions I would want the so called lesser camera and the "pro glass" myself but that wouldn't mean a whole lot.