The One Way is a great commuter bike.
You can switch to smaller tires, if you need to, but the bigger tires should not slow you down if you're riding for purposes other than racing.
The One Way has fenders and, I believe, eyelets for rack mounting. The Rush Hour has neither.
The decals on the 2007 One Way is under the clear coat, so you cannot remove it. The 2008 Rush Hour is clean with no decals, and you can carefully remove the plastic-metal piece from the top tube with a pair of pliers.
Track geometry means that the bike frame (and often fork) is built in a way that allows the front and back wheels to be closer together. Relaxed geometry allows the wheels to spread more apart. (You can draw a wild comparison between a Harley Davidson and a Sport bike -- the former is more comfortable while the latter more responsive.) The One Way has a relaxed geometry (comfortable) while the Rush Hour a track (responsive). As far as reach on either bike, a simple change in the length of the handlebar stem often places you into a position that you prefer.
I own the Rush Hour, but I have it set up for both short commutes and for the track. I love it, but when I commute longer and for groceries, etc., I prefer my other fixed-gear bike with a slightly more relaxed geometry.
If you can live with the decal, and for your intended purpose of commuting carless, then I recommend the One Way over the Rush Hour.
The gearing on either bike can be changed by switching out the rear cog to one that might be more suitable to you, and can cost anywhere from $11 to $24. Not a big deal here.
Good luck. I admire that you're considering going without a car.