What's a suicide bar? I've been riding since college in the '70s and I've never heard the term.
You need good BRAKES, though in traffic an occasional break is nice. I can't tell what's on the bikes you linked to, but if they don't work well, a change to aftermarket brake pads, $20 or so, will help a lot. So will paying attention, so you don't have to use the brakes hard. Also can't tell about tires, but old bikes are likely to have old ones that need to be replaced.
The 64cm single speed may be too big for you, plus as you said, you may want a geared bike, depending on the hills. Of the others, assuming equal condition, I think I favor the Trek hybrid. It may be sturdier, the wheels may be stronger, and the upright riding position should be helpful in traffic.