The 1.4Hdi in the 207 is the better to buy. No dual flywheels, no turbo problems or particle filter problems. You will sacrifice power though.
My opinion is all. Other than that the 207 is a good car. Buy the 1.6 is your willing to put the pounds into minding it, eg changing the oil and filter evey 8k and tending to every warning light as one small thing can mess up alot other things on this engine.