I look forward to hearing your decision. like I said, either choice would be fantastic.
The Zenith is a very conventional design. What turned me away were the overlapping chronograph dials, that is a personal decision though.
Although the fast spinning red 10th hand is cool in action, I just don't use the chronograph all that much...when I do need to time something I don't forsee any situtation where a 10th of a second would be critical. So overall the STATIC appearance of the watch is most important for me... But I can understand where slowly spinning dials can be underwhelming compared to a jumping red hand.
Like I mentionned before the longer PR, the incorporation of a vertical clutch would be solid pluses in the Rieussec's favor.
Best, Mike