The Allez Race C2 is a budget race bike who those that want to save money over say a carbon Tarmac or Giant TCR.
The Madone 2.1 which I have ridden and did not like is way too general do it all of a bike, read this review and check out the performance scores. Trek Madone 2.1 review | road.cc

Here is one for the Allez Race. - Specialized Allez Race - First ride review - BikeRadar
this sentence in the review sums it up for me- Keeps up with carbon bikes costing a lot more – for the money this bike is hard to beat