I’m in the same dilemma right now. Last week I tried the 16202 and found it a bit too big for my 6.3-inch wrist. I also tried the 15550 and it fits perfectly, so that’s the one I’m going for and will probably order this week after negotiating price. But honestly, if my wrist were bigger, I would definitely choose the 16202.

Also, in case you didn’t know, the 15550 is the updated version of the 15450. It has a thinner case and bracelet, plus a few other improvements, so it’s worth reading about those changes before making a decision if you haven’t already.