I'm shocked you consider Nest working without a C wire to be an advantage. There have been a lot of reported problems of the Nest's "power stealing" functions.
Also, design getting 10 points when they are so similar? That's just a personal preference thing.
Finally, any review of smart thermostats should mention that they are fairly pointless if you are smart enough to program a thermostat. The only savings would come from delaying a temperature change if you're not home, and for most people that would be an extremely nominal savings over even a 10 year period.