Originally Posted by Iride01

You'll be okay on either. Don't fret too much. When you get to doing 300 miles a week, you'll have a better idea what comfort and performance aspects you might address in sizing your next bike. For shorter rides and less frequent, it's no big deal. I was riding a couple hundred a week on a bike that was way bigger than any other person my 71" height would ride and I had no issues. I wasn't competing, so maximizing my power output through proper fit wasn't an issue. I'm on a 56 cm bike now and just as happy with the fit as the 60 cm bike from the 1990's I was riding.