First off I'd like to say that I am really annoyed by the big bike companies that make it really hard to find frame geometry information on their websites.
I looked at the Ruby and Doce geometry but I could not find a geometry chart for the pilot. The Ruby is definitely a more agressive bike that has a longer reach for a given seat tube height so if you're looking for performance and have good flexibility, I'd go for the Ruby. The different Ruby models reflect different frame materials and component packages and what you decide there really depends on your budget. The more money you spend, the lighter the bike and the better the components, so if you're looking for performance, I'd buy what you can afford. If money is no object, the best value is usually in the 75 percentile range. Above that, you are spending a lot of money for lighter components that won't really give you that much in performance.
I'm sorry that I couldn't compare these models to the pilot. That would have helped, but I hope that the info I gave here is useful.
Living life like there's no tomorrow.
http://gorgebikefitter.com/
2007 Look Dura Ace
2010 Custom Tonic cross with discs, SRAM
2012 Moots YBB 2 x 10 Shimano XTR
2014 Soma B-Side SS