Nice image Mike. As for your question. I have both a Summicron (circa 1967), and a Nokton (actually, I've had two Nokton's and regretted selling the first one, so I bought the second). I don't know what you're looking for getting the Cron; it is a wonderful lens, no doubt. Same goes for the Nokton, which has a little different character than the Cron.
My take on the images you've posted is that there's absolutely nothing wrong with them, and they're proof that it's the photographer, and not the equipment that matters. I can't really suggest a course of action, but I have no doubt you'll continue to take amazing images with either lens.