The Amira is definitely lighter than the Ruby. I came from (although still have) a 2007 Ruby Pro. Last year I got the 2012 Amira S-Works which I believe weighs in at 15lbs with components. The better the components, the lighter the bike. Mine has Sram Red.
Bicycling Mag. last year rated the Amira as practically takes you up the hill. They were right. I can say it is an awesome climber and I personally find it to be very comfortable riding. I feel like I can just ride all day long on it.
2012 Specialized Amira S-Works
2012 Vita Elite
2011 Specialized Dolce Elite (raffle prize) - Riva Road 155
Ralaigh Tara Mtn Bike