I have that same 2006, it's a very nice riding bike! I don't ride it enough... But a very nice bike.
$350 is a great price for that.
visually looks great, but only an inspection would confirm .
Around that time the 'elite' model came equiped with 9 spd ... and triples.... but still great stuff.
The 2012 most certainly is 10 spd and obvious double.
with both, I would expect might require fresh tires, possibly chain, brake pads, handlebar tape - it's a given when buying used.
but that's not a decider, the condition of the wheels, drivetrain components and frame should help decisions.
Ultimately, it's the how you like the bike, the ride, the look... Both bikes should have many years, decades left in them, if maintained...
Ride On
Yuri
EDIT: Go to a good bike shop, buy a Park Tools CC-3 chain checker - less than $20... use it often... chains which are ridden until very stretched will cause much faster wear on the chainrings and especially the most used cogs on the cassette - requiring replacement...
If stretch is between .5 and .75 precent it's best to plan a chain replacement...
My main bike, a Tarmac, prolly has 70K+ miles on it and still has the 1st cassette I put on it, when bike was purchased... used...
The Crank/Chainrings are about 30K miles (I went from a 53/39 to a 50/34 - aging... LOL)
Don't buy substitute Brand chain checker, I have tried some, and some were not accurate.