I have been looking for a good deal on a decent single speed commuter for a while, and just found 2 options this week. Unfortunately, that means I need to make a decision. I plan to use it to commute 5 miles each way to and from work, and around town with my kids. Any advice would be greatly appreciated.
Both bikes are in great shape, and fit me well.

First is a Trek Soho S. It has drop bars installed. I like the flat black. I have a history of back problems, so I don't mind that it isn't super aggressive. $275

The second option is a Trek District. It is actually chain driven, which surprised me. I thought these were all belt driven. $200

I can't find much on the chain drive District, so I am having a tough time comparing components and reviews. If you have experience with either, or any advice, I would love to hear it. Thank you!