Can't agree more with Brad. The real question here is 38 vs 40 mm; or RG vs. PT case. As Brad earlier pointed out, the 40 mm is more sportive whereas the 38 more classic. For me it was more about wrist size and knowing the 38mm is a bit harder to find adds to my pleasure. Anyway, I wear the Octa for jeans (or suit). Curiously, my early Octa (yg dial) has had none of the problems of some of the earlier ones and keeps almost as perfect time as the CS. (and I love to see the big date flip at midnight sharp, give or take 30 seconds !) What I also love is that this perfect time keeper is so slim in spite of a power reserve and that the stunning movement has the depth and three dimensionalty that only much larger watch movements generally can afford.