2012 Swift vs 2011 Suzuki SX4?

I'm between these 2.
The 2012 Swift is a demo with about 1,600 miles and in other words, like new. The only bad thing is the small trunk.
The 2011 Suzuki SX4 Sedan has about 9,000 miles, it's in pretty good shape, doesn't feels super new but does offers a trunk, slightly better audio and it's even better for a city full of crazy drivers, but it is 2011.
So I have great prices for both of them, even better for the Suzuki SX4. The difference is about 4k, the Swift is cheeper.
So which one should I buy?
I'm looking for a second-car but it's also going to be the 1st car for my 16 year old boy.