On the minus side — and perhaps fitting with this router's rather retro styling — it's supplied with only 2.4 GHz Wireless - N, and not the (theoretically) less interference prone 5 GHz capability.
The new chip in the Pro, which incorporates the 802.11 a / b / g / n / ac standard, allows the system to utilise the 5 GHz frequency which is lessprone to interference, making it easier for the Pro to take full advantage of your Internet speeds.