I’m probably going to be the outlier on this thread, but here goes. Either of those bikes should work for your needs, and at 52cm, you should be in the ballpark for your size (my boys are both 5’9” with short legs, and they both ride 52s). For commuting, you might want to check the geometry of the two bikes and go with the one that has the shorter top tube. As far as a front derailleur, you will use them much differently (less harshly) than you might on a mountain bike, so I wouldn’t be afraid of that. You might also want to consider the tire size of the two. The Willard has 700cx40 tires which would be solid for commuting and rougher roads/bad weather but a little wide for longer distance riding. The Marin’s 709cx32 tires are a good, all-around size but maybe a little less forgiveness to road anomolies.

Here’s where many might disagree with me. I assume you are ordering this bike online - otherwise, you would be getting at least a rudimentary fitting at a shop. While many people have bike size preferences based on specific characteristics of their body shape, most riders fall into a fairly normal body shape. Many bike companies have designed their bikes along these standard shapes and sell them Small, Mediom, Large, and X-Large sizes rather than the traditional centimeter sizes. That allows for a fair amount of latitude in getting the perfect fit. The thing is, once you get the bike, that’s when the real sizing starts - moving the seat, adjusting the handlebars, getting the right stem length, etc. That will occur over time. Now, if you intend on racing or doing very long rides, that’s when a detailed, more complete fitting might be appropriate before you sink money into an expensive bike. I’m not saying that a basic fit by a knowledgeable salesperson isn’t necessary - I’m suggesting that if you get the right size, you’ll be able to zero in on the fit over time.

Good luck and have fun!