This is a little weird question.

I have very small wrists. Is the ladies version of a Dynamic that different from the men’s? They seem a lot cheaper and readily available so it got me thinking...

 

Unless you have dainty wrists and even they're to small, much smaller than the men's.

 

I'm always arguing that it's silly to consider a Speedy Reduced "too small" for an average-sized male wrist or "lady-sized," but even I think a ladies Dynamic would look ridiculous on a guy. They're only about 1" long and 1.25" wide and not much bigger than a quarter. Even if your wrists are no bigger than 6" around, you'd be constantly answering people asking whether (or why) you're wearing a lady's watch. These are my wife's next to mine:

 

Yes, it’s probably way too small for current trends.