You shouldn't be riding on the sidewalks in the first place. I don't have much knowledge on either bike, but I think you should really start by testing both bikes, and getting a feel for what is right. Some people can commute with a road racing bike (super thin tires, no racks, etc), while others love touring bikes for all that it offers. Shop around, ask a thousand questions, and just have fun.

You're doing the right thing in research first, then making purchases. Last thing you want is your first big purchase to be a mistake.