URL: http://www.performancebike.com/shop/profile.cfm?SKU=23648&subcategory_ID=3040
The weight is about the same-- maybe the carbon is 1lb lighter... Also, bikes are an additional 20% off the sale price.
Scattante is a brand Performance acquired when they purchased another bicycle retailer. (Maybe Supergo, but I don't really remember.) Like many other companies, Performance has these private label bike frames made in Asia. I've taken a gander at a number of these frames when wandering through my local Performance Shop and they look OK.
Component wise, they both have a pretty typical mix of stuff that will be found on most bikes at this price level. With more Ultegra stuff, I'd be somewhat tempted by the R660. Mind you, there is nothing wrong with 105 components, but Ultegra is a bit lighter and smoother.
Honestly though, I'd forget about the components and focus on the ride quality. Get the shop to fit you, then take each one for an hour or so ride. Buy the one that feels best to you. Don't buy after a 10 minute ride in the parking lot. That simply won't turn up issues with fit and comfort.
I love Performance and have spent thousands of dollars in their shop and online. The local manager is a buddy and I know most of their mechanics by name. I have never been impressed with their bicycle sales people, though, and have never bought a bike there. I strongly recommend you ride some comparably priced bikes at other shops. I'd try out theTrek, Cannondale, Specialized and Giant in roughly the same price range. You may find you love a Scattante, or you may find another bike that is just perfect for you.
Hope this helps.
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