2019 is third year into hatchback production, so 19 MY cars should have less chance of getting a lemon? I've never had bmw or mercedes dealers refusing warranty work. It's quite disconcerting about honda dealers...
For me, buying new gives me the peace of mind that I know (more or less) the complete history of the car. I mean even if it is 1 or 2 years used, the previous owner could have abused it or modded it. Also, as keepitmoving said. So 2019 gets my vote
With a turbo, i would prefer to buy a new one if i can. The chance of previous owner tuning the motor and abused it is pretty high. With NA motors i wouldnt mind buying a few years old pre owned.