Between a 2018 and 2019 tyre, the difference can be in the selling price, tyre shop give slightly more discount for 2018/manu tyre because of perceived older tyre but there's nothing wrong with tyre in between 3 years of manufactured date...if deep pocket then go for new minted tyre, for bargain hunters 2017 tyres with good price is not a crime, and degradation is minimal to impact the integrity of the tyre