As mentioned in the introduction, the Allez Sport has some signifcant upgrades over the entry level Allez model.

The frame is the same as the Allez, but with a carbon fork for an improved ride quality, make the ride smoother by absorbing the vibrations from the road. The shifting is much improved, using Shimano's new 9 speed Sora groupset for better, smoother gear changing.

Here's Specialized's description of the Allez Sport:

Stiff, light, race-inspired Allez Sport offers great acceleration and handling—perfect for aspiring racers, or as a winter training bike for more accomplished veterans. 9-speed Shimano gearing and lighter wheels improve efficiency over any terrain.

• Premium double-butted A1 aluminium frame offers unsurpassed quality, durability, and lightweight while featuring our race proven geometry for precise handling.
• Tough, durable three cross Axis Classic wheel with J bend spokes
• Specialized oversized aluminium bar is stiff and light for serious performance
• Supportive BG Riva Road is the perfect combination of comfort and efficiency
• Specialized FACT carbon fork provides precise steering through the tightest turns and ultra light weight
• Never miss a critical shift with new Shimano Sora STI shifters

The Allez Sport is a great bike for the newcomer to road riding, offering a much improved ride over the entry level Allez model, and offers a good all round package that offers value for money.